Hybrid Sealant Polymer (SMP/STPE)
CAS Number: 67762-19-0
Hybrid Sealant Polymer (SMP/STPE) is a silane-terminated polyurethane or polyether designed to combine the best properties of polyurethane and silicone technologies into a single product. It offers high elongation, excellent adhesion, fast skinning, and outstanding weathering resistance with no isocyanate hazard. Used widely in construction, automotive aftermarket, and industrial maintenance, it delivers durable elastic seals on concrete, metals, and plastics.
Technical Specifications
| viscosity | 15,000–40,000 mPa·s (23 °C) |
| appearance | Colorless to pale yellow liquid |
| skinOverTime | 10–30 min (23 °C / 50% RH) |
| tensileStrength | 1.5–3.0 MPa |
| elongationAtBreak | >300% |
Applications
- Facade and expansion joint sealing
- Automotive aftermarket glass and body sealing
- Industrial maintenance sealing on metal structures
- Sanitary and kitchen sealants
- Marine and RV sealing applications
Key Features
- Combines PU performance with silicone weathering resistance
- Isocyanate-free formulation
- Fast surface cure and deep-section cure
- Excellent adhesion to concrete, metals, and plastics
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CAS Number
67762-19-0
Category
Adhesive / Sealant AdditivesAvailability
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