SikaBond®-T21 is a one-component, all-in-one, permanently elastic, very low permeability moisture-cure polyurethane adhesive and vapor retarding membrane for full surface wood floor bonding. Bonds solid wood flooring up to ¾” thick and 8“ wide, and engineered planks up to 14“ wide directly to concrete without length limitations.
Where to Use: SikaBond®-T21 may be used for solid and engineered wood floors (strips, longstrips, planks, panels, boards), mosaic parquet, industrial parquet, wood paving (residential) as well as chip boards and plywood. Once cured, Sikabond®-T21 will generate a super strong bond to a variety of substrates for glue down installations and at the same time form a membrane which reduces moisture vapor transmission from the subfloor and sound reduction membrane.
Advantages: 270% elongation | Extremely easy to trowel | Crack bridging | Low odor | Excellent Green Grab | Suitable for common types of wood flooring | Creates sound reduction layer | Especially good for problematic woods such as beech and bamboo | Contains no water | Eliminates sleepers and plywood over concrete and gypsum substrates | Highly elastic – allows planks to expand and contract without damage to the adhesive | Tenacious bond