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EFA+™

Wood Flooring Adhesive and Moisture Vapor Retarder
Product overview

Bostik’s EFA+™ is an easy-to-trowel urethane adhesive and moisture control membrane. It provides a tough, flexible, tenacious bond to a variety of surfaces. EFA+™ elastomeric characteristics allow the adhesive to move with the wood as it expands and contracts over the life of the floor. EFA+™ exhibits a long open time making installation easier and faster. This adhesive has low VOC’s and does NOT contain any water.

 

Geographic availability
  • Canada
  • United States of America
Available sizes
4 gallon pail

Smart Advantages

 
Easy spread
Great ridge retention
Low VOC

Latest news

Jan 11 2023
  • Campaigns
  • Wall & Floor
  • News

Bostik Launches Sweepstakes Campaign for a Harley-Davidson® Motorcycle

Bostik, a world-class leader in specialty adhesives and flooring installation systems, proudly ...
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Jul 05 2022
  • Bostik Academy
  • News
  • Wall & Floor

Introducing Bostik Academy – A Technical Knowledge Center for Industry Professionals

Bostik proudly announces the launch of Bostik Academy for North American contractors, distributors, ...
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Next events

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NWFA National Wood Flooring Expo 2023

Tuesday May 2 - Thursday May 4 2023
Wisconsin Center | Milwaukee, WI

There's never been a better time to accelerate your business and reconnect in-person than at the ...

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JLC LIVE 2023 | Residential Construction Show

March 23 - March 25, 2023
Rhode Island Convention Center | Providence, Rhode Island

JLC LIVE New England is the PREMIER regional industry event for residential construction. Learn ...

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Flooring Systems' Surface Prep & Adhesives Hands-on Training

February 27 - 28, 2023
Bostik Academy Training Center 11320 West Watertown Plank Rd Wauwatosa, WI 53226

In this hands-on course, learn about the newest innovations and installation techniques in surface ...

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The International Surface Event (TISE) | SURFACES 2023

Tuesday, January 31 – Thursday February 2, 2023
Mandalay Bay Convention Center | Las Vegas, NV.

A B2B floor covering event under The International Surface Event (TISE) brand, SURFACES is the ...

EFA+™ provides moisture protection

Bostik’s 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.

Bostik’s 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 Bostik’s EFA+™ for unlimited moisture vapor protection, or use Bostik Ultra-Set® SingleStep2™ or GreenForce®

EFA+™ provides superior elasticity and anti-fracture performance

Bostik's 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 Bostik EFA+™ for ultimate versatility

Use Environments Substrates Flooring Types
Residential Concrete Solid Hardwood
Offices/Light Commercial Plywood Engineered Hardwood
Heavy Commercial OSB Bamboo
  Recycled Rubber Underlayment Cork
  Well-Bonded Vinyl Parquet
  Terrazzo Plywood
  Ceramic Tile Ceramic Tile, Marble, Stone Inlays (residential or light commercial only)
  Cement Backer Board  
  Gypsum Underlayments (dry, above grade)  
  Cement Patch/Underlayment  

 

 

 

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