Sentinel 539 Sealer/Primer Odor Encapsulant has all of the characteristics of Sentinel 538 with the added benefit of antimicrobial product protection, which inhibits the growth of mold and mildew on the cured coating surface. This sealer contains a fungistatic agent with inhibits the growth of stain and odor causing mold and mildew on the the cured coating surface. Sentinel 539 is available in a white and clear formula.