This hand-applied vapor barrier mastic helps crews close localized gaps in Stego Wrap installations before slab placement. It suits professional underslab moisture mitigation work where pipe penetrations, utility clusters, edge terminations, or small repairs need reliable detailing without power tools.

• Seal irregular pipe penetrations and utility clusters where tape alone cannot maintain contact.
• Terminate wrap edges cleanly against walls, footings, and other boundary conditions.
• Repair small cuts, gaps, and localized openings before reinforcement and concrete placement.
• Maintain vapor barrier continuity on medium and large slab pours with a hand-applied product.
• Apply indoors or outdoors without power tools for fast crew deployment.

Choose from 3 variants; use this mastic for localized sealing, not full vapor barrier coverage.