All-in-One Wood Flooring Urethane Adhesive, Unlimited Moisture Vapor and Sound Reduction Membrane

SikaBond®-T21 is a one-component, low VOC, permanently elastic, super strong, very low permeability moisture-cure polyurethane adhesive, vapor retarding, crack bridging and sound reduction membrane all-in-one for full surface wood floor bonding.

  • 270 % elongation
  • Bonds up to 3/4" solid and engineered wood
  • Extremely easy to trowel
  • Unlimited subfloor moisture vapor protection
  • No moisture testing required - a dry to touch substrate is the only requirement
  • 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
  • Permanently elastic – allows planks to expand and contract without damage to the adhesive
  • Tenacious bond