Moisture Barrier/Primer - $275.00

Bona® R540 is a one-component, roll-on moisture membrane specially designed to mitigate vapor transmission on absorbent and non-absorbent subfloors, including gypsum-based underlayment. 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. 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 in 1-2 hours. No more tears in paper or seams to be concerned with – the continuous film offers more uniform coverage and moisture protection