Installation Guide

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MultiGrip

™

URETHANE WOOD FLOORING ADHESIVE

KEY FEATURES

– High performance urethane formulation

– For all glue-down wood & bamboo

flooring

– Easy clean-up

DESCRIPTION

Bostik MultiGrip™ is an easy-to-trowel urethane adhesive

and moisture control membrane. It provides a tough, flexible,

tenacious bond to a variety of surfaces. MultiGrip™'s elastomeric

characteristics allow the adhesive to move with the wood as

it expands and contracts over the life of the floor. MultiGrip™

exhibits a long open time making installation easier and

faster. This adhesive has low VOC’s (as calculated per SCAQMD

Rule 1168) and does NOT contain any water.

MOISTURE PROTECTION

MultiGrip™ 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. MultiGrip™ may be used for concrete slabs with elevated

moisture levels up to 6 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 80% RH (tested in accordance

with ASTM F-2170). For substrates that have an MVER of greater

than 6 lbs or 80% RH, use Bostik MVP4™ prior to the application

of MultiGrip™ for unlimited moisture vapor protection, or use

Wood-Grip™ Advanced™.

ANTIFRACTURE PERFORMANCE

MultiGrip™'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.

ULTIMATE VERSATILITY

MultiGrip™ may be used to adhere all engineered, solid (adhesive

only), bamboo (adhesive only), cork, and parquet hardwood

flooring (adhesive only). This adhesive can also be used to install

plywood as described, as well as ceramic tile, marble, and stone

inlays for light commercial and/or residential applications.

MultiGrip™ may be used over all properly prepared substrates

common to hardwood flooring installations including:

concrete, plywood, OSB, well bonded vinyl/VCT and ceramic

tile, cement backer board, gypsum underlayments (dry, above-

grade), cement patch/underlayments, radiant-heat flooring,

and properly prepared terrazzo.

LEED

CONTRIBUTION

MultiGrip™'s low-VOC formulation (as measured per EPA

Method 24) may contribute toward LEED

credits under section

EQ 4.1: Low-Emitting Materials – Adhesives & Sealants.

DIRECTIONS FOR USE

Read and understand data sheet completely before

beginning installation. Follow industry standards and

flooring manufacturer’s recommendations for acclimation,

design, layout, and application of wood flooring material.

If jobsite conditions are outside of flooring manufacturer’s

recommendations, take necessary corrective actions. Whether

the moisture content of substrate exceeds or is within the

flooring manufacturer’s recommendations, to address current

or possible future subfloor moisture, and cracks (up to 1/8"),

apply MultiGrip™ as directed.

T2159 - 07.28.15

Summary of content (4 pages)

PAGE 1
MultiGrip ™ URETHANE WOOD FLOORING ADHESIVE KEY FEATURES – High performance urethane formulation – For all glue-down wood & bamboo flooring – Easy clean-up DESCRIPTION Bostik MultiGrip™ is an easy-to-trowel urethane adhesive and moisture control membrane. It provides a tough, flexible, tenacious bond to a variety of surfaces. MultiGrip™'s elastomeric characteristics allow the adhesive to move with the wood as it expands and contracts over the life of the floor.
PAGE 2
SURFACE PREPARATION CLEAN UP All surfaces must be absorptive, clean, and free from loose materials, oil, grease, sealers, curing compounds, waxes, silicates, laitance, and all other surface contaminants that may inhibit proper bond. Completely remove cutback adhesive residue or other surface contaminants by diamond grinding to open the pores of the concrete.
PAGE 3
backed parquet. • Do not use in areas subject to hydrostatic head. • Do not use MultiGrip™ as a moisture vapor membrane beneath solid or bamboo flooring. • This membrane is designed to reduce moisture vapor emissions that originate/emanate from below the membrane only. • This membrane does NOT reduce/affect issues originating from the sides, ends, or top of flooring (ie. puddles, water, leaks, hydrostatic-head, etc.).
PAGE 4
TROWEL SELECTION In order to form a membrane that functions properly for moisture vapor protection, the right trowel needs to be selected to achieve both 100% coverage of the substrate and 100% transfer to the back of the flooring. Jobsite conditions, profile of the substrate, depth of back channeling in the flooring, and other factors affect the amount of adhesive that must be applied to achieve proper coverage and transfer.