Stego Mastic - Seal Pipe Penetrations & Terminating Edges

When you're sealing vapor barrier penetrations around plumbing pipes and electrical conduits in concrete slabs, this mastic provides the airtight seal required to maintain system integrity. The single-component formula bonds directly to Stego Wrap and other polyolefin vapor barriers without primers or additional prep work. Apply it around pipe penetrations, at foundation walls, and along terminating edges where the barrier meets vertical surfaces. The compound remains flexible after curing to accommodate minor substrate movement while maintaining a continuous moisture barrier. Works in temperatures down to 20°F for year-round installation. Each container covers approximately 30 linear feet at standard bead size. Built for foundation contractors and concrete crews installing complete below-slab vapor barrier systems.