We treated the mold-affected areas of the basement by first applying an EPA-registered antimicrobial (MAPS 1). After letting it dry, we then applied a patented sealant (MAPS 2) that encapsulates the mold and kills in at the cellular level. This sealant, available only to companies licensed to use the product, not only kills existing mold. It also has the ability to reactivate with moisture to kill future mold growth in the treated areas. It's great further protection should any mold return to that area.