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The Importance of Spray Gun Cleaning

by | Dec 14, 2016 | Spray Guns

With over 100 years of combined experience in the spray foam industry, SprayWorks Equipmentย is the leading supplier of spray foam equipment. We are dedicated to making sure your business has everything you need to get started when it comes to spray foam, and to grow well into the future.

A major component of a successful spray foam business is ensuring your equipment is in tip-top condition and is ready to tackle any job. This means regular spray gun cleaning as well as maintenance on its assorted parts. By understanding how to clean a spray gun, youโ€™ll be able to keep it in great condition for many years to come.

Why Cleaning a Spray Gun Is Necessary

Your spray foam equipment will experience a lot of wear and tear through its lifetime. To assure the longevity of your equipment, along with professional results on all jobs, we recommend regular and proper spray gun cleaning.

Cleaning your spray gun should be performed regularly, but if youโ€™re noticing your gun is delivering less than perfect results or it keeps getting clogged during application, it is definitely time for deep cleaning your spray gun!

Tips on How to Clean a Spray Gun

spray gun cleaning

The best thing for the health of your spray gun is a quick cleaning of your equipment at the end of each dayโ€™s work. While your spray gun can perform just fine for a few days without it, spray gun cleaning makes your job during deeper cleanings easier, and it also ensures your equipment doesnโ€™t malfunction or get clogged.

Cleaning your spray gun is essential for not only the outside surfaces of your equipment, but the inner workings and mechanical parts of your spray foam gun as well. The abusive nature of using grinders and wire brushes to clean parts can often cause premature wearing of parts just by cleaning them alone. Therefore, we recommend using a quality gun cleaner such as our power flush system. Any rags or brushes you do use should be cleaned after each use as well so that theyโ€™re clean and ready for the next time.

Utilizing a heated parts soaker or even a nonheated soaking pot to clean parts ensures you are ridding your spray gun of any debris, buildup, or contaminants. Be sure to reference the manufacturer for proper soaking times when spray gun cleaning.

Check out our video on how to clean your spray gun.

Spray Gun Cleaning with Dynasolve CU-6

Using high-quality products is key to a proper spray gun cleaning. When deep cleaning a spray gun, we recommend adding Dynasolve CU-6 to your cleaning regimen. This spray gun cleaning solution is a unique cleaning and flushing solvent for urethanes used for cleaning all types of plural component spray guns. Dynasolve is extremely effective in penetrating, loosening, and removing cured urethane foam deposits and buildup that collect in your spray gun during daily use. It is also effective in quickly cleaning polyurethane reactive hot melt (PUHRM) urethane adhesive from roll coating and dispensing equipment. When heated, this solvent can also clean many types of epoxies and other adhesives.

How to Clean a Spray Gun with Dynasolve CU-6


To use Dynasolve for cleaning your spray gun or other equipment, immerse and soak the parts in the solution until residue and debris is loosened and can be wiped away. Once debris and buildup has been removed, rinse the spray gun parts with water and dry thoroughly. Dynasolve can be heated mildly to 130-150 ยฐF or you can utilize compressed air for the agitator to produce faster results.

Utilizing Dynalube for Maintenance After Cleaning a Spray Gun


While you now know how to clean a spray gun, something that is equally important is using high-quality products to keep your equipment intact when your spray gun is in storage. After flushing your spray gun with Dynasolve CU-6, it is essential to introduce a fluid through the spray lines to prevent residue reacting with moisture in the air when not in use.

Dynalube is a high-quality storage fluid that will help eliminate the formation of polyurea and crystallized isocyanates that may form to keep the spray gun in peak condition. This product enhances the lifespan of your equipment, which is particularly crucial if you plan to store it after cleaning a spray foam gun.

Answering Your FAQs on How to Clean a Spray Gun

Should I clean both the exterior and interior of my spray gun?

Yes, when cleaning a spray foam gun, it is important to clean both the exterior and interior. Implementing extra care and these proper cleaning techniques will add to the longevity of your spray gun.

Can Dynasolve CU-6 be used for extended periods of time?

It can! One of the many reasons we advocate for Dynasolve CU-6 as the premier option for cleaning a spray gun is because it may be used for extended periods of time, so your operations will be all set.

Can Dynasolve CU-6 tolerate high resin loadings?

Yes, Dynasolve improves the performance of commodity solvents and can tolerate high resin loadings.

Iโ€™m learning how to clean a spray foam gun, but Iโ€™m not sure where to dispose of the cleaner. Do you offer anything that is recyclable?

Yes! Dynasolve CU-6 is recyclable via vacuum distillation and is noncarcinogenic and nonozone-depleting.

Are your products flammable?

No, we want to ensure full safety when cleaning a spray gun. Therefore, the products that we recommend are nonchlorinated and nonflammable.

After cleaning a spray gun with Dynasolve CU-6, when should I use Dynalube?

After flushing the unit thoroughly with Dynasolve CU-6 to remove all uncured and cured polyurethane, flush the unit with Dynalube 1-3 times to remove the CU-6 flushing solvent. Be sure to pump Dynalube into the system so that it remains in all areas of the unit before storing indefinitely.

Should I use grease after cleaning a spray gun?

Yes! Youโ€™ll want to apply grease and lubricant to your spray gun after using it so that it remains well-oiled and smooth for continued use. 

Where is the best place to store my equipment after cleaning it?

Following the cleaning of a spray foam gun, it is best to store it in a cool, dry area.

Contact Us Today for More Information About Spray Gun Cleaning

SprayWorks Equipment was built with the idea of creating a welcoming place for contractors and businesses. This way, they could not only find the equipment they need, but get real-world training and support on things such as how to clean a spray gun.

If youโ€™re interested in learning more about how to clean a spray gun or are in search of tips for spray gun cleaning, contact us today!

Written by: <a href="https://sprayworksequipment.com/author/john-davidson/" target="_self">John Davidson</a>

Written by: John Davidson

John Davidson is Partner and VP of Operations at SprayWorks Equipment and is an SPFA PCP Certified Roofing and Insulation Installer, Roofing and Insulation Project Manager, and Supplier Rep. With over 35+ years of experience in the spray foam and polyurea industry, John brings a wealth of knowledge and hands-on experience. He has worked on commercial and residential buildings, bridges and infrastructure.

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