I was happy with the spray foam gun for about a month. After lying down for a while, he refused to work, at least foam did not come out of him. Of course, I read the instructions after I bought the tool, and there was nowhere to get a special cleaning bottle. If we had known in advance what was inside, there would have been no repairs. However, one way or another, it would break someday, so it made little difference.
So here it is, the gun. This one has a regulator, but there are simpler and cheaper ones. The black handwheel behind the handle (on the right) is the regulator. By rotating it like a water tap, you can adjust the strength of the stream.
On top there is a valve assembly with a socket for installing a cylinder. In its central part there is a protrusion into which the balloon's "piggy" fits. There, inside, it is compacted along a cone, this place will be shown larger
The foam container needs a special one, with a thread (this part is made of black plastic). White color – balloon valve stem....
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How to wash a spray foam gun?
Answer:
A mounting gun is an indispensable thing in a house where it is customary to do at least part of the home improvement work yourself. Of course, there are cylinders from which foam is supplied directly, but knowledgeable people They prefer to use a pistol.
Firstly, using cylinders is unreasonably expensive, plus the quality of work done this way is much worse. Secondly, the gun allows you to make neat and reliable seams, even if a beginner gets to work.
Interesting! Boiler ventilation in country house, Here!
But what to do if the polyurethane foam has dried right in the gun, and you suddenly need it urgently? It’s worth saying right away that it’s better, in principle, not to lead to such problems, because washing a gun for polyurethane foam is labor-intensive and slow.
So, you need a gun right now, but you can’t use it. What to do in this case?
The gun hook doesn't move...
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Repair involves the use of many tools. And one of the most popular and popular is a spray foam gun. This device allows you to apply foam accurately, accurately and quickly. But at the same time, the pistol is a rather capricious device that requires careful handling and careful adherence to operating rules. A truly good quality pistol has a high price. Therefore, device failure is always an unpleasant event. Every craftsman who uses this device in his work must know how to disassemble a foam gun for cleaning or repair. Proper handling of it will save your money and nerves.
Basic operating rules
First, store the gun only with the valve closed. Secondly, remove the foam container...
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If you are sure that you will use the gun for two weeks from the date of last use, then you can not clean it at all, but simply leave the used foam can on it, screwed on. If you remove the can, the gun will dry out.
Cleanliness before and after work
To clean the mounting gun, it is recommended to rinse it with a special solution, which is sold packaged in cylinders. To do this, remove the can of foam and screw on the can of cleaning liquid. After this, place a bucket or other container into which the liquid from the gun will drain, and gently press the hook for 3-5 seconds.
Wipe the edge of the mounting gun with a rag, wait 5-10 minutes and repeat pressing the hook for 5-10 seconds. And so on until the cleaning container is completely used up. After this, unscrew the container and shake off the remaining liquid from the barrel. The gun is cleaned and ready for storage and further use.
Dry cleaning
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A spray foam gun allows you to apply foam accurately and economically, and is simply indispensable in modern repairs and construction. But what if the foam in the gun has dried up and it no longer works?
First of all, I would like to note that it is better not to bring the instrument to such a state. First, never press the hook of the gun after unscrewing the cylinder. The fact is that in this case the pressure inside the gun drops and air gets in, and the foam immediately hardens. If you plan to use the foam gun in the near future, it is better to store it with the bottle screwed on and the jet regulator tightly screwed on.
Second, if you haven't used the gun for two weeks, blow some foam into a garbage bag. This will renew the foam inside the device and it can be stored for another couple of weeks.
If you are not going to use the installation gun for a long time, then you need to purchase a bottle of cleaner...
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1 How to easily and quickly wash foam? ?
Video on the topic
Video about removing polyurethane foam
Click on Play to view
Polyurethane foam is one of the most problematic contaminants after repairs. To minimize the effort of cleaning surfaces from it, stock up on cleaners in advance. Often, manufacturers of this sealant also offer cleaners, so buy a set right away, even if the product offered is more expensive than the one on the next shelf. The fact is that each manufacturer has its own polyurethane foam formulas, and not every solution for removing polyurethane foam will cope equally with two different materials.
Most cleaning products only work on fresh suds, so try to remove stains as soon as they appear. It is much more difficult to get rid of contaminants that are more than 3-4 hours old - during this time the material will have time to completely harden, and to clean such contaminants, other solvents will be required, with...
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It should be immediately noted that the application of polyurethane foam to the plane of building structures can be done directly from a cylinder, or using a specialized tool. Moreover, the latter option is more acceptable in the professional field, since it implies the possibility of uniform application of the substance. This is why it is very important for any builder to understand how to disassemble a foam gun for the purpose of repair or cleaning.
The primary action in this direction will be to determine the degree of contamination of the equipment, that is, before cleaning the foam using a mechanical method, it is advisable to try restoring it by washing. For this purpose, a flushing cylinder is screwed into the place where the working cylinder is installed and the old composition is washed off by pressing the trigger three times.
If the specified action does not help restore the instrument, it is necessary to completely disassemble the equipment in order...
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Polyurethane foam can be called one of the most difficult substances to remove. Due to its purely synthetic structure, this construction foam product has some features of removal from various surfaces. And a lot depends on whether the foam is fresh, hardened or dried.
For some surfaces it is harmful to wash this substance while it is still fresh. For others, wait until the foam hardens or dries. When using special removers and various solvents, there are many conflicting opinions from users. The main obstacle to wiping off foam with store-bought antifoam products is that you must know the brand of polyurethane foam. But builders do not always leave empty cans as “mementoes.” And traces may not be detected immediately.
Throwing away the container and then trying to figure out how to wash the polyurethane foam is also a fairly common scenario. Therefore, you need to understand in what cases it would be most appropriate to use a wash. A...
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We remove dried polyurethane foam using available folk and chemicals
Answering the question - how to clean dried polyurethane foam, you need to find out chemical composition, determine which solutions can remove such contaminants without leaving a trace. There are many special liquids that will help effectively remove hardened foam from wooden, metal, and plastic surfaces. But what to do when the product gets on your hands, body or face? This construction material consists of polyurethane foam, has a high degree of adhesion and strong adhesive properties. This is why it is so difficult to clean from various surfaces. But this needs to be done! How can you wash polyurethane foam with wooden products?
When the foam gets in the wrong place...
In such cases, acetone comes in handy; it dissolves liquid foam right before your eyes. But he will serve as an assistant until the composition dries out. And then only mechanical or chemical ones will be required...
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In cases where the foaming process requires special care and precision, a foam gun becomes simply irreplaceable.
Before starting any work with the mounting gun, you must ensure the safety of your hands and eyes by wearing safety glasses and gloves.
Loading the gun
After removing the protective cap from the cylinder, you should screw the cylinder with polyurethane foam into the gun holder. In this case, the cylinder must be in a vertical position with the adapter facing up, the gun, as you guessed, must be turned over with the handle down and the cylinder holder down.
While screwing the cylinder, one hand holds the gun by the handle, and the other at the same time screws the cylinder with polyurethane foam onto it.
Next, you need to shake the container with mounting foam well so that the polyurethane foam sealant in it becomes uniform in composition. Holding the foam container with your hand (the gun is in the handle-up position), you should...
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They're lying. Last week I broke one pistol. He dropped it from a height and his nose broke off. In the second gun, since last summer, polyurethane foam glue was loaded (in general, it’s the same foam, but with low expansion, and one and a half times more expensive). I didn’t notice any particular advantages, so I only used half the bottle and left it just in case. Once the main pistol broke. I took a spare one. Opened it and everything works.
All pistols have a problem with the stuffing box, where the back end of the needle comes out of the tube, near the trigger. Over time, the foam gets there, dries, and the needle begins to move tightly. And as a result, the foam does not completely overlap; you have to constantly tighten the “rear” screw when you are not working.
You can disassemble the gun, wipe it with a rag, remove all dried foam mechanically, replace the oil seal, I used a piece of rubber tube of a suitable diameter, instead of some kind of oil seal packing. I lubricated it with lithol and everything works.
To...
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12
You already know that polyurethane foam, according to the method of release from the cylinder, can be used for household and professional use. Household polyurethane foam is produced in cylinders with an adapter - a flexible tube through which foam is supplied and sprayed under pressure. Cylinders with professional polyurethane foams require the use of special mounting guns.
What is a foam gun, what is it for, the price of a foam gun, how to use a foam gun - in this article we will try to answer all these important questions.
There is an opinion that a mounting gun is not needed for household work, but those who try to work with a gun appreciate its advantages and subsequently choose it for permanent work.
Why? Because a spray foam gun is a convenient device in all respects, consisting of a tube with valves at the ends, equipped with a handle with a dispenser trigger. On the barrel there is a valve and...
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Essentially speaking, there are no secrets or nuances when working with a pistol.
The Stayer polyurethane foam gun is of high German quality, ergonomics and user-friendly design.
Remember that it will be impossible to prove the malfunction of the tool once you start using it with foam. Therefore, only after protective measures have been completed can the work be considered completed.
After all the manipulations, we carefully assemble the gun and, in general, it is ready for use. This will prevent the polyurethane foam from drying out; therefore, the next use will be much easier, since no preliminary cleaning will be required. When installing various structures, it is often necessary to use power tools in Orel, which allows construction and repair work to be carried out more efficiently. The result, as a rule, is always the same - the gun refuses to work. Handle the gun choke needle carefully, it is its most sensitive to mechanical...
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It would have been advisable, of course, to take care of this earlier. How to clean a spray foam gun if it has dried in it?
Podolstroy.com.ua, 10/31/2014
It would have been advisable, of course, to take care of this earlier, before it dried out. Now you have to manually pick something. Disassemble the gun as much as possible, it is easier to clean it in detail. Take the wire and solvent. Pry as much as you can with wire, pour solvent into it, and pick again. It should help. The solvent will soften the foam, and use the wire to break through the cork. Then, for complete cleaning, run foam cleaner through the gun. There are probably no other ways.
It would have been advisable, of course, to take care of this earlier, before it dried out. Now you have to manually pick something. Disassemble the gun as much as possible, it is easier to clean it in detail. Take the wire and solvent. Pry as much as you can with wire, pour solvent into it, and pick again. Should help....
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Message from BOA(chick)
Being the first seller of Macroflex in Russia, many thoughts came to my mind...))) And I thought about what and how to do with this foamy stickiness back in 1994...
Foam, with a tightly screwed trigger with a tube, hardens to a maximum of 5 - 10 cm and is stored until the end of the shelf life (I mean from normal manufacturers)... It does not harden in the valve and trigger due to the lack of air... The same thing happens in a gun with a screwed tube... And the tubes can be used many times by stretching them and cleaning them with a knitting needle... The foam does not stick tightly to the P/E...
Came to the same conclusion. Therefore, after using it a little, I put the cap from the jar on the end of the tube. Some more foam is poured into it and hardens. Then next time you can simply tear it off, cut off part of the tube or clean it, as you like, and continue to use it.
I'll tell you one more scary story from life. The other day I took out two cans of macroflex foam from old stock....
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How to repair a foam gun
Rules for using a spray foam gun
The tool will quickly fail if you:
Leave a filled gun without a cylinder;
Keep the instrument valve open when not in use for a long period of time;
Store the gun on which the foam container is screwed for more than seven days;
pull the trigger without a cylinder.
Before each subsequent use of a spray foam gun, you should clean it with a knife.
The most common cause of gun failure is foam that has dried in it. To prevent this from happening, you must:
After each use, rinse the instrument thoroughly;
Wash the gearbox and gun nozzle not only after each use, but also when changing foam cylinders.
The condition of the instrument is also adversely affected by falls and strong blows. If for some reason...
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Answer:
Mounting gun– an irreplaceable thing in a house where it is customary to do at least part of the home improvement work with your own hands. Of course, there are cylinders from which foam is supplied directly, but knowledgeable people prefer to use a gun. 
Firstly, using cylinders is unreasonably expensive, plus the quality of work done this way is much worse. Secondly, the gun allows you to make neat and reliable seams, even if a beginner gets to work.
But what to do if the polyurethane foam has dried right in the gun, and you suddenly need it urgently? It’s worth saying right away that it’s better, in principle, not to lead to such problems, because washing a gun for polyurethane foam is labor-intensive and slow. 
So, you need a gun right now, but you can’t use it. What to do in this case?
The pistol hook does not budge. This indicates that the foam has frozen inside and you absolutely cannot put pressure on it in an attempt to correct the situation - you risk breaking the fragile frame.
It is necessary to carefully remove the foam with a knife from the beginning of the barrel, without scratching the piston, and then drop the solvent there, pointing the gun so that it flows downwards. Make sure that the solvent does not get on other parts!
Next, we gently try to set the hook in motion until it begins to give in, and at the same time we remove the foam that begins to come out along the rod. If everything went well, we blow out the gun by putting on a valid cylinder.
The above manipulations did not help. This means that the foam has cemented the main valve of the gun. You can try carefully pouring the solvent (literally a drop!) onto the ball in the place where the balloon is inserted. After ten minutes, you need to blow out the device with a special cleaner. If this does not help, you will have to remove the valve. 
To remove the valve you need to unscrew the crown.
This must be done carefully, holding the gun exclusively under the socket, otherwise the plastic case will crack, and this is certain death of the device. Then we drip solvent into both the gun and the nest itself. After waiting 15 minutes, you need to press the ball, it is advisable to use a wooden stick, otherwise you will scratch or even split it.
After all the manipulations, we carefully assemble the gun and, in general, it is ready for use. By the way, foam may escape at the seams, this is not a problem, the foam will cover these places, and the voids inside will be treated with a special liquid. 
As you can see, washing a spray foam gun is a long and nerve-wracking undertaking. All this can and should be avoided by constantly cleaning the gun after use. Then it will serve for a long time, and you will not have to worry about disassembling the mechanism.
And you can also look video Cleaning the gun from foam
The main difficulty in operating the gun is cleaning the structure after using polyurethane foam. Despite the convenient design of use and the advantageous advantages of the tool over household cylinders with a conventional applicator, the design has an inconvenient structure for trouble-free cleaning.
Cleaning of the foam is carried out immediately after application, before the sealant has had time to completely dry. But if the material has hardened, there are methods to get rid of contaminants.
Pistol design
Under no circumstances should the foam be washed off with water, because it is a kind of catalyst that enhances the polymerization process of this material.
To avoid unforeseen situations, you should acquire a cleaner in advance to remove traces of polyurethane foam. It is recommended by specialists to purchase a product of the same brand as the sealant used in the work.
This requirement is due to the fact that manufacturers create cleaners based on their own formulas for making polyurethane foam. Using products from one brand leads to effective results.
System for using foam remover:
- After applying the mounting sealant to the appropriate areas, the can is removed.
- The cleaner bottle is screwed into its place.
- The trigger is pressed until the stream from the gun is free of traces of polyurethane foam.
This completes cleaning the device. All that remains is to check the structure for the absence of sealant residues. If further use of the cylinder with material for filling sutures is expected, the cap is returned to its place until the next use.
Device with purifier Any cleaners are essentially solvents. All of them can be harmful to health. Therefore, they follow safety rules.
Protective measures:
- The product should not be stored in direct sunlight or near objects with high temperatures;
- Empty cylinders must not be burned or opened after use;
- The tool is directed away from you during the work process. Getting the material into the nose, eyes and mouth is unacceptable; if this happens, you should immediately seek medical help;
- The product should not be stored near open flame sources;
- It is recommended to ventilate the room well.
Method for removing hardened sealant accumulations
In cases where flushing with the cleaner is not completed on time and foam has blocked the trigger, another method of combating contamination is used.
Do not press too hard on the frozen trigger. If the mechanism does not yield to pressure when gently pressed, then applying force will break it.
The action plan in this case is as follows:
- First, the tool barrel is freed from external contaminants. Often foam sticks to the gun and a knife is used to remove it. The structure should be cleaned very carefully so as not to damage the piston.
External cleaning with a knife - After this, the device is lowered down. Using a special solvent designed to remove hardened sealant, treat the beginning of the structure with a small amount of the substance. In this case, you should avoid getting the solvent liquid on other components of the instrument. This leads to damage to the gun and damage.
- After waiting a little, try to squeeze out the foam by carefully pressing the trigger. This must be done without sudden movements or use of force. If the situation is not too advanced, the liquefied sealant will gradually come out. Otherwise, you will need to change tactics.
- A tightly fixed trigger in the gun indicates that the main valve is clogged with sealant. In the area where the cylinders are attached, there is a small ball onto which you need to pour a very small amount of dissolving liquid. After a ten-minute wait, a bottle of cleaner is attached and cleaning is performed in the standard way.
And finally
Typically, following these steps will help resolve the problem:
As a last resort, more radical measures are used. The tool should be held at the bottom (under the socket) and unscrew the crown. Remove the valve from the structure and set it aside.
Disassembled tool Pour a small amount of solvent (literally a few drops) into the inside and into the nest itself. The holding time is at least a quarter of an hour. Then, by pressing the ball, all internal components should be cleared of foam.
Then they begin to assemble the tool. The procedure is performed in reverse order. Under no circumstances should you pull the trigger of a gun unless it is equipped with a sealant bottle. This reduces the service life of the device.
In contact with
A foam gun is a special device that allows you to hermetically blow seams into building structures. Purchasing such a device will save money, since regularly purchasing individual cylinders with a tube will cost much more.
Despite all the advantages of the pistol, it has an unpleasant feature - it clogs up at the most inopportune moment. The situation gets worse if the instrument is not properly cared for. What to do if dried foam clogs the hole and the gun no longer wants to work?
How to clean the mounting gun after work?
To ensure that the tool lasts as long as possible, it is important to clean it in a timely manner. The fact is that the foam dries quickly, clogging all the “insides” of the gun, as a result of which it becomes unusable. If it is easy to get rid of a fresh blockage by removing the dried compound by washing with special means, then removing the old blockage will take a lot of time and effort.
Professionals, who know better than anyone else how to clean a foam gun, advise washing it with a chemical cleaner immediately after use. It is advisable to purchase foam and cleaning liquid from the same manufacturer, since in this case the formula of the cleaner will be selected specifically for effective removal components of the mounting mixture.
You can clean the tool after use as follows:
- The empty can is unscrewed, and in its place a bottle of cleaning liquid is installed, from which the protective cap is first removed.
- After this, you need to press the trigger and continue until pieces of polyurethane foam stop coming out of the gun. As soon as the stream is clean, you can remove the cleaner bottle and put the tool back in place.
To prevent the question of how to properly clean a foam gun from becoming a headache, you need to prevent the formation of sticky plugs inside. In this case, the device does not even need to be disassembled for complete cleaning and you can safely continue to use it after washing.
How to clean a dried out foam gun?
If blockages have formed inside and completely blocked the barrel, do not put a bottle of cleaning fluid and mercilessly press the trigger in the hope that the dried plug will magically dissolve.
It is better to use the following action plan:
- Clean any debris from the outside of the barrel. This can be done with a knife, but it must be used very carefully, avoiding damage to the mechanism.
- Lower the gun down and drop some solvent into the barrel at the base. It is important to ensure that the caustic cleaning liquid does not come into contact with other parts, as this may damage them.
- Wait a couple of minutes and try to pull the trigger. If the solvent has worked, the dried mixture will become softer and begin to gradually come out. The main thing is to use force carefully.
If the situation has not yet become catastrophic, then the problem of cleaning a clogged foam gun can be solved in 10-15 minutes.
Cleaning the Main Valve
Sometimes the mixture dries out so much that it blocks the trigger and the tool becomes unusable. To solve this problem, you need to find a small ball at the place where the balloon is attached, drop a little solvent on it and leave for 10 minutes. After waiting the allotted time, you need to install a bottle of chemical cleaner and press the trigger. Clumps of foam should begin to come out of the barrel; if this does not happen, then complete disassembly of the device, complete washing and subsequent reassembly are required.
Full flush
In particular difficult cases Heavy artillery will have to be used. To fully eliminate dried residues and subsequent normal functioning, it is necessary to disassemble the tool into parts and clean each separately.
First of all, the valve crown, which is located at the point where the cylinders are attached, is unscrewed. The solvent is poured inside and the removed part is treated with it. The device is left in this form for half an hour, then you need to try to press the ball of the main valve. If clumps of polyurethane foam come out, it means everything worked out; there is no further need to disassemble and clean the tool. Assembly is carried out in reverse order.
Otherwise, you will have to dismantle all the removable parts, pour acetone inside the gun barrel, wait a little and start cleaning with wire. As soon as the tip of the wire appears from the other end of the barrel and pieces of foam no longer come out, you can reassemble the gun and wash it again with a regular cleaning agent.
If you rinse and carefully clean the mounting gun in a timely manner, it can be used for many years to come.
Polyurethane foam is a real salvation not only for construction specialists, but also for amateurs. It can cope with sealing of almost any complexity, and is used when installing windows and doors, as well as soundproofing metal pipes and bathtubs.
What are the advantages of using a spray foam gun?
The ability of the material to quickly harden and the reliability of its fixation are the main reasons for the popularity of the material in construction and repair. However, these same advantages force specialists to work with foam very carefully, because removing its cooled remains is not an easy procedure.
Today, a foam gun is not a mandatory attribute; in construction stores you can find a huge selection of cans filled with material. If you will use the foam only once, then there is no need to buy a gun. However, in practice, purchasing a tool still turns out to be completely justified.
A device for applying mounting foam provides several great advantages:
- it becomes possible to accurately dose the material used;
- ability to adjust the material feed speed;
- comfortable use of foam in conditions with irregular cavities and limited access;
- stopping the supply of material when the lever is released;
- the possibility of using an incomplete cylinder, without the risk that the material inside it will harden;
- given that daily use gun, there is no need to remove frozen material from it.
During pauses between operations, oxygen does not enter the tool's access supply system. Accordingly, the material in it does not set. A small ball of frozen foam at the end of the tube is responsible for sealing the barrel. Tightness on the cylinder side is ensured by a closed trigger mechanism. If you immediately replace old cylinders of material with new ones after use, then you don’t have to think about cleaning the tool for the next few weeks. All you need to do is cut off the dried ball and continue applying the material.
For beginners who have no experience in working with a gun, we advise you to purchase a special cleaner along with the tool, which will come in handy more than once when servicing the equipment.
To avoid having to spend a long time cleaning the working tool from the remains of dried foam, you need to think about its cleanliness in advance. To do this, along with the gun, buy everything you need to clean it.
It is possible to thoroughly wash equipment only if you follow two important conditions: speed and forethought. Both of these factors imply the purchase of a special cleaning agent and efficiency in its use. At the same time, experts advise buying a cleaner from the same company that produces the polyurethane foam you purchased.
The device should be cleaned immediately after use, without waiting for the foam to dry completely.
Having finished applying foam, immediately begin cleaning the instrument without waiting for it. To do this, remove the used cylinder from the gun. If it still contains foam, then there is no need to throw away the container - the material in it will retain its characteristics for a long time. Then remove the protective cap from the purchased cleaner. Attach the product to the gun. Next, press the trigger of the gun several times, repeating the pressure until there are no particles of dried material in the stream.
After this, the cleaner must be removed and the free play of the start lever must be checked. You can also use the remaining product on things and surfaces on which foam particles have frozen. The main thing is to remember to close the can of cleaner.
When removing foam residues, you should never forget about safety precautions. The chemical components contained in the cleaner can cause severe harm to human mucous membranes, eyes and skin. Moreover, the rinsing agent is in a container under pressure, so one careless movement can lead to big trouble.
When using the cleaner, please follow safety precautions
First of all, the cleaning product should be stored away from sources of heat. It is best if the cleaner is kept in a cool, dark place. Secondly, do not smoke near purifier cylinders - they are highly explosive. Thirdly, rinse the instrument only after first protecting your skin from contact with drops of the product. To do this, wear thick gloves and a respirator.
The solvent stream should be directed away from you and ensure that its drops do not fall on the skin. Use old clothes, as fabric is quite difficult. If during the cleaning process the drug does get into your eyes or mucous membranes, be sure to rinse it with plenty of clean water. Do not under any circumstances attempt to cut an empty product container or use it for other purposes.
If you decide to clean the gun for applying polyurethane foam, but a large amount of dry material has already accumulated in it, then do not try to remove it by force. In most cases, the foam will remain inside the tool, and some of its elements may break. To prevent this from happening, you will have to act very carefully and show maximum patience.
First of all, you will need to remove any remaining material on the outer walls of the gun. To do this, you need to use a sharp construction knife and carefully scrape off the particles without damaging the piston. After this, you need to put on gloves and draw acetone into the syringe. Next, the gun is lowered down to the floor, and a few drops of solvent are poured into the beginning of the barrel next to the trigger mechanism. At the same time, be careful and try not to get the product on the plastic elements of the tool.
Next, begin to smoothly pull the trigger. If you remember the need for cleaning not too late, material that has not yet completely dried will begin to flow out of the device’s nozzle. After this, secure the cleaner bottle in the gun and remove any remaining foam inside. As soon as the flushing of the gun for applying polyurethane foam is completed, the container with the cleaning agent must be removed and tightly closed with a lid.
If the trigger of the tool cannot be pressed, this indicates that the ball valve is jammed. In such a situation, cleaning the gun for applying polyurethane foam will be a little more complicated.
To clean the tool, locate the metal ball next to the gearbox that holds the foam canisters. After this, fill the ball with acetone and leave it for 15 minutes. Do not rush around with the tool to prevent liquid from spilling onto other parts of the gun.
Next, securely secure the container with the cleaner and begin to gently press the trigger of the gun to blow through the barrel. If the acetone has acted and destroyed the dry material on the surface of the ball, then all you have to do is thoroughly clean the gun from the dried foam.
Remaining material from the outside of the gun must be carefully scraped off with a knife.
If all of the above measures do not help, then you will need to pour acetone as deep as possible, partially disassembling the gun for this. To do this, hold the tool with your left hand in the place where the cylinders are fixed. Carefully unscrew the adapter, remove the valves and set them aside. Pour solvent into the barrel and the place where the cylinders are attached and set the gun aside for half an hour. After this, start pressing on the ball, gradually removing any adhering foam particles from it. If you followed the described algorithm, then dissolved material will begin to flow out of the gun nozzle.
At the end, all that remains is to assemble the tool in the reverse order and attach a bottle of cleaner to it in order to completely get rid of the foam in the device.
All these measures will help remove the remaining foam that remains in the device at the outlet, has already hardened, but has not yet fully gained its characteristic strength.
Cleaning the instrument in advanced cases
You can clean the gun from completely hardened polyurethane foam using various methods and means. However, you need to be prepared for the fact that in the end you will not be able to return the tool to an acceptable working condition. However, you still need to try.
To begin, take a rigid metal wire, the diameter of which will be a couple of millimeters smaller than the diameter of the barrel. You will also need acetone for the job, so be sure to wear gloves and a respirator.
Completely disassemble the working tool without stripping the threads. Large pieces of frozen material must be scraped off with a construction knife. Next, start picking out the foam, being careful not to make very sudden movements with your hand with the wire. First, remove dry material from the trigger lever and valve. After that, move on to cleaning the trigger barrel of the gun. To do this, drop acetone inside the part and wait about 15 minutes. As a result, the foam will soften, and you can stick the wire inside it and then pull it out along with the frozen material. Once you've finished cleaning the barrel, attach a bottle of cleaner to the tool and begin flushing it.
