RadonAway Pro Hybrid Sealant — Polyurethane (Limestone)

Professional-grade hybrid polyurethane sealant engineered specifically for radon mitigation. Seals slab penetrations, foundation cracks, sump-pit perimeters, and pipe-to-concrete joints with a flexible airtight bond that lasts the life of the system.

Why mitigators choose Pro Sealant

• 50%+ joint movement — stays sealed through seasonal expansion and contraction
• 85% less VOCs than comparable polyurethane sealants — less off-gas, faster occupancy after install
• Non-yellowing limestone color blends into concrete and slab surfaces
• Moisture-cure formulation — sets up in damp basement and crawlspace conditions
• Meets radon-mitigation airtight-seal standards

What to use it for

• Sealing 4" / 3" PVC vent pipe to slab penetrations
• Filling foundation hairline cracks before activating a sub-slab system
• Sealing sump-pit cover perimeters (used with Jackel SMR16101-CV or similar)
• Air-sealing crawlspace plastic-to-foundation transitions

Specifications

• Part number: 28523
• Color: Limestone
• Chemistry: Polyurethane/silicone hybrid
• Joint movement: 50%+
• Application: Standard caulking gun, 10.1 fl oz tube

Pair with the TrimTight PVC Cement for a complete sealing toolkit on any sub-slab depressurization install.