PR 11 Water Based Primer

PR 11 Water Based Primer

PR 11 is a water based primer used to prepare flooring substrates for the application of PROFLEX™ 90 flooring underlayment. This product must be applied to the flooring surface before PROFLEX™ 90.

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Weight 10 lbs
Size 1 gallon
Coverage 300 sqft. (when applied with a roller)
Quantity 1 pail
Availability Usually ships in 1-3 business days

Use PR 11 Before Installing Proflex™ 90 Underlayment

Proflex™ 90 is our unique soundproofing product for floors. It’s a laminated rubberized membrane flooring layment that you can install on your ceramic tile, stone or brick floor to provide effective soundproofing and dramatically reduce sound transmission between floors. While you can easily install this product without special tools, it will be most effective if you apply a primer beforehand. PR 11 Water-Based Primer is our water-based primer product designed specifically for preparing your floor to apply Proflex™ 90 flooring underlayment.

Each order of our PR 11 Water-Based Primer comes as a one-gallon pail, which is enough to cover as much as 300 square feet. Simply shake up the product and then apply evenly with a roller.

Make sure your substrate surface is completely clean, dry and clear of debris first. If you’re using the product in an exterior location, make sure no rain is forecast anywhere nearby within a few hours of when you intend to use it.

After 15 to 45 minutes, your floor substrate should be fully primed, and you can confidently apply your Proflex™ 90 for high-quality soundproofing.

Our PR 11 Water-Based Primer can help ensure that your floor underlayment enjoys a tight bond with the subfloor on everything from wood to concrete. While this product is safe to use, you’ll want to wear eye and skin protection while using it and be sure that you have sufficient ventilation in the area where you’re applying your primer.

If you’ve never used primer before or you’re not familiar with how floor underlayment works, don’t worry. It’s all quite simple, and our soundproofing experts will be happy to walk you through each step. Call us now at 1-866-949-9269 with any questions about how to use this product.




  • Protect Primers from freezing.
  • For exterior applications, PR 11 should not be applied if rain is imminent.
  • Store in a clean dry location between 50 ºF and 100 ºF.
  • Do not thin or mix with any other products.
  • Keep out of reach of children.
  • Do not swallow or ingest.
  • Avoid eye and skin contact. We always recommend eye protection and gloves when installing any of our products.
  • Dispose of in an environmentally safe manner.
  • Keep covered when not in use.
  • Always allow proper ventilation when using any primer, sealant or adhesive.


Tools Needed: Brush or Paint Roller Applicator

Materials Needed: 1 Primer Roller is supplied with every roll of PROFLEX™ 90


Substrate surface must be clean, dry and free of all bond inhibiting materials. Stir and shake PR 11 thoroughly. Apply with a brush or roller at 300 sqft per gallon. Porous surfaces may require additional applications. Allow PR 11 to dry for 15 to 45 minutes. High humidity levels may extend drying time. Surface will appear slightly opaque when the primer is dry.

Customer Reviews

Average Customer Ratings: 4.8 (34 reviews)

The times I talked with you on the telephone and corresponded through email you have been very helpful and efficient. I would highly recommend to anyone!

– S. Cimino, PA

I have emailed a lot of different manufactures and I have to say your customer service is head and shoulders above all of them. I emailed your company at about 9pm my time and when I woke up the next morning you had already answered my question and then the follow up was a few hours later. I am impressed. Thanks a lot for the quick turn around!

– E. Gustafson, NV

I just wanted to send a quick thank you for your rapid response and helpfulness. I very much appreciated it. You have been responsive in every way all through the process. It has been a pleasure doing business with you and your company.

– T. Alexander, CA

I just wanted to let you know that in the end, sealing the air spaces on this door worked just fine and took care of the problem.

I really appreciate you taking so much time to share your expertise with me, and in particular recommending I try the simpler solution before investing in more expensive noise barriers. That is a big credit to you and your business.

– Mike

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If you need a quote quickly and would rather talk to a warm body, then dial 1-866-949-9269. No pushy sales guys…promise.

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