ECB® is a self-bonding, sheet applied elastomeric membrane and is designed for use under floor surfaces that require protection from structural movement.ECB® consists of a base layer of polymer modified elastomers, permanently laminated to a unique "stress flex" fiber sheet. Together they form a single 40 mil (1/16") thick, high strength self-bonding membrane that is easily applied. The elastomeric base functions as a buffer, absorbing the thermal and lateral structural movement of the sub-floor (up to 3/8"), while the "stress flex" fiber sheet creates a new flooring surface which will accommodate most ANSI A118.4 mortars, organic adhesives and epoxy setting materials. ECB® adheres permanently to the substrate, remains flexible and will last the life of the flooring surface.