Bona R820 – Silane-Based Adhesive for Engineered Wood Flooring
Bona R820 is a one-component, silane-based wood flooring adhesive specially designed for engineered flooring installations with low movement. Featuring excellent initial bonding strength, long open time, and easy trowel application, Bona R820 provides professional flooring contractors with a high-performance, clean-application adhesive that works across multiple substrates.
Certified by GREENGUARD for indoor air quality and containing zero VOCs, Bona R820 is perfect for both residential and commercial jobs where air quality and safety are top priorities.
Why Choose Bona R820?
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One-Component, Easy Application
No mixing required—spreads smoothly and holds solid ridge stability for reliable installation.
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Long Open Time
Up to 90 minutes of working time allows flexible application and board adjustment.
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Zero VOCs & GREENGUARD Certified
Environmentally friendly, safe for indoor use, and compliant with strict air quality standards.
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Safe on Pre-Finished Floors
Easy cleanup—won’t harm or etch pre-finished floors and won’t stain hands.
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Versatile Adhesion
Bonds to a variety of surfaces including concrete, plywood, radiant heat systems, and engineered substrates.
Product Details:
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Packaging: 3-gallon container
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Spread Rate: Up to 75 sq. ft. per gallon (varies by trowel size)
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Open Time: Up to 90 minutes at 70°F, 50% RH
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Cure Time:
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Moisture Limits:
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Up to 6 lbs. MVER or 80% RH with standard trowels
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For higher moisture conditions, use Bona R540 or Bona RollGuard as a moisture barrier.
Perfect For:
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Engineered flooring installations up to 7” wide, 5/8” thick
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Both residential and commercial projects
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On-grade, above-grade, or below-grade installations
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Applications over concrete, plywood, radiant heat, and more
Pro Tip:
Pair Bona R820 with Bona R540 or Bona RollGuard for enhanced moisture protection when working in areas with elevated humidity or concrete slabs with borderline moisture levels.
Bona R820 delivers superior bond strength, environmental safety, and installer-friendly handling—making it a top choice for professionals working with engineered wood flooring.