The Safe Way to Ease Moisture Issues Quickly!
Bona® R540 Moisture Barrier/Primer 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.
• 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 – continuous film offers more uniform coverage and moisture protection• Easy to apply – rolls on • Suited for underfloor heating‡
* Only one coat needed when used with 1250G or 1500G trowel and any Bona Silane Adhesive. Two coats required in all other installations when the above criteria is not met.† Can help prevent cupping caused by excessive subfloor moisture.‡ Radiant heat systems will have a maximum moisture protection of 6 lbs. or 80% RH.
Bona AB is a family-owned company founded in 1919. With its headquarters in Sweden, Bona is now present in more than 90 different countries all over the world through subsidiaries and distributors. We provide products for the installation, maintenance and renovation of hardwood floors.
Bona US24 Inverness Place EastEnglewood, CO 80112United States