EFA+™
EFA+ is an easy-to-trowel urethane adhesive and moisture-control membrane. It offers a flexible and tenacious bond to various surfaces. The elastomeric properties of EFA+ allow it to move with the wood as it expands and contracts throughout the floor's lifespan. With a long open time, EFA+ simplifies and speeds up the installation process. This adhesive is low in VOCs and completely water-free.
- Canada
- United States
Smart Advantages
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TDS
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3-Part Specifications
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Bostik Commercial Hardwood Flooring Installation Products Limited Warranty
Bostik’s EFA+ provides moisture protection
EFA+ has low moisture-vapor permeability and is not adversely affected by moisture. As a result, it will reduce moderate amounts of moisture vapor transmission through the concrete. When applied as directed as a moisture vapor membrane, it will prevent damages caused by subfloor moisture beneath dimensionally stable, engineered wood flooring only.
EFA+ may be used for concrete slabs with elevated moisture levels up to 15 lbs. per 1,000 square feet per 24 hours (using an anhydrous calcium chloride test kit according to ASTM F-1869 test method), and up to 87% RH (tested in accordance with ASTM F-2170). For substrates that have an MVER of greater than 15 lbs or 87% RH, use Bostik’s MVP4™ prior to the application of EFA+ for unlimited moisture vapor protection, or use Bostik's Ultra-Set® SingleStep2™ or Bostik's GreenForce®
EFA+ provides superior elasticity and anti-fracture performance
EFA+’s elastomeric characteristics establish an anti-fracture membrane that can bridge cracks up to 1/8" (3mm) which can occur in the substrate prior to or after installation. This superior elasticity allows the adhesive to move with the wood as it expands and contracts with changes in humidity and temperature over the life of the floor.
Use EFA+ for ultimate versatility
| Use Environments | Substrates | Flooring Types |
|---|---|---|
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Residential |
Concrete |
Solid Hardwood |
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Offices/Light Commercial |
Plywood |
Engineered Hardwood |
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Heavy Commercial |
OSB |
Bamboo |
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Recycled Rubber Underlayment |
Cork |
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Well-Bonded Vinyl |
Parquet |
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Terrazzo |
Plywood |
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Ceramic Tile |
Ceramic Tile, Marble, Stone Inlays (residential or light commercial only) |
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Cement Backer Board |
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Gypsum Underlayments (dry, above grade) |
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Cement Patch/Underlayment |
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Related market & applications
Wall & Floor
- Hardwood Flooring
