Stego Mastic - Seal Pipe Penetrations & Terminating Edges

When vapor barriers meet utility pipes or terminate at foundation walls, gaps compromise the entire moisture protection system. Stego Mastic provides a workable sealant specifically formulated to bond vapor barriers to concrete, metal pipes, and terminating edges where standard adhesives fail. This non-hardening butyl-based compound maintains flexibility throughout temperature changes and substrate movement, preventing moisture intrusion at critical transition points. Apply directly from the tube to seal around plumbing penetrations, electrical conduits, and perimeter edges before slab placement. The compound stays pliable to accommodate minor shifts without cracking or losing adhesion. Essential for commercial and residential contractors installing below-slab vapor barriers who need reliable protection at every penetration and termination point in moisture-sensitive applications.