With unique ribbed surface and composite backing, Barrier-Bac provides extra strength and super peel adhesion in its vapor barrier products. The products are made in the U.S. and exceed all requirements of ASTM E 1745 and ACI 302. Its patented cross-lamination production process offers high-puncture resistance, high-tensile strength, and very low permeance. Barrier-Bac. 877-535-0555. www.barrierbac.com