Protecto Seal Vapor Block is a spray-applied permanent sealer formulated to penetrate concrete surfaces. The manufacturer claims that the sealer seeps approximately 1 inch below the concrete surface, allowing for surface repairs to occur after application without impacting the integrity of the seal, as well as protecting against through-slab moisture vapor emissions to provide a suitable substrate for Protecto Wrap’s Flooring Underlayments. protectowrap.com
