SikaBond T-21 ALL-IN-1 Urethane Hardwood Adhesive 4 Gallon Pail

SikaBond T21 is a one-component, low VOC, moisture-cure polyurethane adhesive that offers permanent elasticity, superior strength, and low permeability. This all-in-one adhesive acts as a vapor retarder, crack-bridging agent, and sound reduction membrane for full surface wood floor bonding. With an impressive 270% elongation, it bonds up to 3/4″ solid and engineered wood, and is incredibly easy to trowel. The adhesive provides excellent green grab, a low odor, and crack bridging capabilities. SikaBond T21 is ideal for a variety of wood floors including solid and engineered wood, parquet, mosaic parquet, chip boards, and plywood. Upon curing, it creates a strong bond to multiple substrates, while acting as a moisture vapor reduction membrane and contributing to sound reduction for glue-down installations.

Why Choose SikaBond T21 ALL-IN-1 Urethane Hardwood Adhesive?

• 270% Elongation: Provides flexibility, allowing wood to expand and contract without damaging the bond.
• Unlimited Moisture Vapor Protection: No moisture testing required, just a dry-to-touch substrate.
• Crack Bridging: Ensures stable, long-lasting bond even over cracks in the subfloor.
• Low Odor: Offers a cleaner, more comfortable installation environment with minimal scent.
• Permanently Elastic Bond: Creates a tenacious, flexible bond that accommodates wood movement without damage.

Product Specifications

• Packaging: 4 gal. (15.14 L)
• Color: Light Brown
• Sag Flow: Consistency: Spreads very easily
• Ambient Air Temperature: Room temperature between 60 °F (15 °C) and 90 °F (35 °C)
• Relative Air Humidity: Between 40% and 70% during installation (check wood floor manufacturer's requirements)
• Substrate Temperature: Greater than 60 °F (15 °C) during laying and until fully cured; For radiant floor heating, less than 70 °F (20 °C)
• Substrate Moisture Content: Concrete must be visibly dry, free of moisture or hydrostatic issues
• Curing Rate: Light foot traffic after 6–8 hours (at 45–50 SF/gal, P5 trowel); Light foot traffic after 12 hours (at 30–35 SF/gal, SC+MB trowel); Sandable after 18 hours
• Skin Time / Laying Time: ~45–60 minutes (at 73 °F (23 °C) and 50% R.H.)

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At My Floor Haven, we make it easy to find the perfect flooring for your home or business. Explore our extensive collection of engineered hardwood floors, laminate floors, solid hardwood, and more. Shop online today for premium quality and unbeatable prices. Whether you're searching for luxury vinyl plank flooring, marble Carrara white tiles, or durable waterproof flooring, we’ve got you covered.

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