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Bona Polyurethane Primer/Moisture Barrier - 5L

Item ID: BONR540
Supplier Part Number: BR54002200USBO
UPC: 737025016227
Stock: 0 - Notify Me
Availability: OUT OF STOCK
Packaging: EACH
Weight: 13.34 lbs
Manufacturer: BONA
Type: MOISTURE BARRIER
Volume: 5 L
Price: $141.44
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Bona® R540 – One-Component Roll-On Moisture Barrier and Primer

Need serious moisture protection before your hardwood installation? Bona® R540 is a one-component, roll-on polyurethane reactive membrane designed to mitigate vapor transmission on a wide range of subfloors—including concrete, gypsum, and wood. Whether you’re installing floors in a new build or a renovation, R540 provides an easy, reliable solution for long-term protection.

Perfectly compatible with the entire Bona Adhesive System, this fast-drying membrane can also be used as a vapor retarder under nail-down wood flooring systems.

Why Choose Bona® R540?

  • Protects against moisture up to 18 lbs MVER or 95% RH on concrete

  • Fast drying—ready for nail-down installs in as little as 1–2 hours

  • Zero VOC for safe, indoor use

  • Easy roll-on application with ¼" nap roller—no seams, no paper tears

  • Ideal for wood, concrete, gypsum-based subfloors, and radiant heat systems

Coverage:

  • 300–400 sq. ft. per 5-liter jug (for vapor retarder applications)

  • 400 sq. ft. per coat (for moisture barrier use with Bona adhesives)


Simply roll it on, let it dry to a transparent film, and move forward with your installation confidently.

Shield your flooring investment with Bona® R540—your simple, powerful defense against moisture!

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