DriSeal® ONYX Ultimate Moisture-Vapor-Barrier Coating and Primer can be used on both concrete and wood substrates and is suitable for a wide selection of flooring types. It is a durable, water- based system that primes, reduces substrate moisture vapor emissions, and also works as a barrier for concrete alkalinity. DriSeal ONYX is pre-mixed, and is formulated in black to offer a great visual indication of coverage. It is low odor and low VOC, and it contains antimicrobial protection for enhanced resistance to mold and mildew.