Mold Sealant. (Encapsulating Mold) Mold sealant is a paint-like substance designed to seal a moldy surface from which the mold cannot be fully removed, like wood. Encapsulating mold in this way is generally only done when the moldy material cannot be removed and replaced. There are some risks involved with the process. In order to remove as much mold from the surface as possible, wooden surfaces may be sanded. However, sanding moldy wood sends hundreds or thousands of tiny mold spores into the air, where they are easily inhaled. Call SERVPRO of Milwaukie/ Happy Valley we will be happy to get the job done!