EFA+ is an elastomeric urethane hardwood floor adhesive and moisture vapor retarder that works well on a variety of surfaces.

Wood Flooring Adhesive and Moisture Vapor Retarder

Bostik EFA+™ is an easy-to-trowel urethane hardwood floor adhesive and moisture control membrane with superior properties that provide a tough, flexible, and tenacious bond to a variety of surfaces. Its elastomeric characteristics allow the adhesive to move with the wood as it expands and contracts over the life of the floor.

Use Environments

  • Residential
  • Offices/light commercial
  • Heavy commercial


  • Concrete
  • Plywood
  • OSB 
  • Well-bonded vinyl
  • Terrazzo
  • Ceramic tile
  • Cement backer board
  • Gypsum underlayments (dry, above-grade)
  • Cement patch/underlayments

Flooring Types

  • Solid hardwood 
  • Engineered hardwood
  • Bamboo 
  • Cork
  • Parquet
  • Plywood
  • Ceramic tile, marble, stone inlays (residential or light commercial only)


  • Easy spread
  • Great ridge retention
  • Low VOC