Bostik EFA Plus Adhesive - 4 Gal

Bostik EFA+™ – Easy-to-Spread Urethane Adhesive and Moisture Vapor Retarder

If you’re looking for a flooring adhesive that’s flexible, tough, and ready to tackle moisture concerns, Bostik EFA+™ is a top choice. This easy-to-trowel, urethane adhesive offers a strong, elastic bond that moves with your wood flooring through seasonal changes, ensuring long-term stability.

Perfect for engineered hardwood, solid wood (adhesive only), bamboo (adhesive only), cork, and parquet floors, EFA+™ also acts as a moisture vapor retarder, protecting against moderate moisture from concrete slabs up to 15 lbs MVER or 87% RH.

Why Choose Bostik EFA+™?

• Easy spreading and great ridge retention for faster installations

• Moisture protection—ideal for subfloors with moderate moisture levels

• Bridges substrate cracks up to 1/8" with built-in anti-fracture properties

• Low VOC and LEED® v4 contribution for better indoor air quality

• Flexible bond that expands and contracts with changing humidity

Coverage:

• 30–35 sq. ft. per gallon for engineered wood up to 5/8"

• 20 sq. ft. per gallon for thicker flooring or plywood

Bostik EFA+™ can be installed over concrete, plywood, OSB, radiant-heat flooring, and more—giving you versatility no matter your project.

Make every wood floor installation smoother and safer—choose Bostik EFA+™ for outstanding performance!