We then scrubbed away the mold and applied MAPS 2, which is our patented sealant that encapsulates the surface mold is growing on and renders the mold non-allergenic and harmless. MAPS 2 is also moisture-sensitive and reactivates whenever it gets wet to prevent the return of mold. Since the homeowner already purchased a commercial grade dehumidifier and will install it on his own, mold growth will no longer be an issue.