Roof Sealant for Silicone Systems
Moisture-Cure Silicone Sealant for High-Movement Roof Details
Roof Sealant for Silicone Systems is a high-solids, single-component silicone flashing sealant designed to flex, seal, and protect critical roof details in silicone-based systems. This moisture-cure formula bonds tightly to unprimed TPO, PVC, and EPDM, forming a breathable yet waterproof barrier with outstanding UV resistance, weathering durability, and adhesion strength.
With urethane-grade elongation (468%) and excellent tear resistance, this sealant thrives in high-movement areas and is trusted for use in demanding conditions. It offers excellent sag resistance on verticals, minimal prep, and superior compatibility with silicone topcoats—making it a reliable solution for edge sealing, flashing, and complex penetrations.
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Features & Benefits
Designed for Silicone Roof Systems
- •Bonds to unprimed, weathered TPO, PVC, EPDM, and more
- •Compatible with primed cap sheet and modified bitumen
- •Creates a flexible flashing-grade seal without primer on most substrates
High-Performance Durability
- •Withstands –80°F to 350°F and UV exposure (5,000 hours ASTM D-6694)
- •Excellent crack resistance in joints, penetrations, and seams
- •Remains flexible through extreme thermal cycling
Fast Application & Moisture Curing
- •Single-component, no mixing required
- •Tack-free in 20–30 minutes; full cure in 48 hours
- •Applies with brush or trowel right from the pail
Weatherproof & Breathable
- •Water-resistant while allowing vapor release
- •Maintains bond and strength even in high humidity
- •Ideal for ponding-prone areas and vertical surfaces
Sustainable & System-Ready
- •90% solids by volume for high coverage
- •<50 g/L VOC; meets national and regional compliance
- •Available in White, Gray, and Black
Where to Use It
Ideal for critical detailing and field repair in silicone-based coating systems:
Technical Highlights
| Solids by Volume | 90% |
| VOC | <50 g/L |
| Tensile Strength | 205 psi (ASTM D-2370) |
| Elongation | 468% (ASTM D-2370) |
| Tear Resistance | 25 lb/in (ASTM D-624) |
| Reflectivity (White) | 0.88 (ASTM C-1549) |
| Emissivity (White) | 0.90 (ASTM C-1371) |
| SRI | 110 (CRRC) |
| Tack-Free Time | 20–30 min |
| Full Cure | 48 hours |
| Temperature Stability | –80°F to 350°F |
| Service Temp Max | 185°F continuous |
| Color Options | White, Gray, Black |
| Packaging | 2-gallon pails |
Supporting Resources
Take Action Today and Seal What Matters
Detail work shouldn't be the weak link in your roofing system. Roof Sealant for Silicone Systems is engineered for flexibility, longevity, and maximum adhesion to tough substrates—giving you dependable protection where it counts most. Use it to reinforce every seam, edge, and penetration with confidence.