D-261™ Extreme Moisture Vapor Barrier Coating is a two-component, high performance, rapid drying, epoxy formulated to dramatically reduce moisture vapor transmission and surface alkalinity from substrates including; “freshly-poured/green concrete”, properly prepared concrete, cement backer board, cement patch/underlayments, radiant heat flooring, and cement-based terrazzo prior to the installation of carpet; vinyl/VCT; engineered or solid hardwood; porcelain, marble, granite, or ceramic tile floor covering. D-261 contains Bostik’s Blockade™ antimicrobial protection and utilizes a breakthrough, silver-based, antimicrobial agent that provides built in protection to inhibit the growth of a broad range of odor causing bacteria, mold and mildew on the surface of the coating’s film. D-261 is uniquely formulated so that it may be applied to fresh “green” concrete as soon as it has achieved “initial set” (when the concrete can be walked on without disturbing the surface). It is pigmented light green for visual indication of coverage and film thickness during the installation process. It is extremely durable and wear resistant.
When properly installed, D-261 is designed to reduce the moisture vapor emission rate of even the most challenging concrete slabs from < 25 pounds per 1,000 ft2 per 24 hours to < 3 lbs. per 1,000 ft2 per 24 hours (per ASTM 1869). This non-flammable, non corrosive, low odor, non-blushing formulation requires no solvent wiping, and has no application window in which floor covering adhesives must be applied to achieve a strong bond. D-261 is formulated to be effective in reducing the surface alkalinity of concrete slabs to pH levels of 9 or lower as recommended by the Carpet and Rug Institute and the Canadian Carpet Institute, making them ideal for bonding with most adhesives.