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Bona Polyurethane Primer/Moisture Barrier 5L

Ranked #3 in  Adhesives

Bona R540 is a one-component roll-on moisture membrane specially designed to mitigate vapor transmission on absorbent and non-absorbent subfloors. The polyurethane reactive primer is compatible with the entire Bona Adhesive System.

Item ID: BONR540
Supplier Part Number: BR54002200USBO
UPC: 737025016227
Your Price: $116.13
Free Shipping via FedEx Ground on orders over $200!
Stock: 42 - Notify Me
Availability: In stock - Ready to Ship
Packaging: EACH
Weight: 13.34
Manufacturer: BONA
Volume: 5 L
Estimated Arrival Time:
  • Helps mitigate potential moisture issues, like cupping*, originating from below the membrane, in new and existing construction
  • When used as a primer, one coat increases adhesion over sealed subfloor systems, ie. AdvanTech™
  • Can be used as a vapor retarder in place of felt paper for wooden subfloors up to 20% MC
  • One coat can be used for damp proofing concrete subfloors up to 95% RH & 18 lbs.**
  • Dries fast allowing nail-down installation immediately
  • No more tears in paper or seams to be concerned with – all continuous film offers more uniform coverage and moisture protection
  • Easy to apply – rolls on
  • Suited for underfloor heating+ 

* Can help prevent cupping caused by excessive subfloor moisture.
** Only one coat needed when used with 1250 or 1500 trowel and any Bona Silane Adhesive. Two coats required in all other installations when the above criteria is not met.
+ Radiant heat systems will have a maximum moisture protection of 6 lbs. or 80% RH.

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