Product Description
TREMstop® Fyre-Sil SL is a self-leveling, neutral-cure silicone firestop sealant engineered to protect both through-penetrations and fire-rated joints. It delivers outstanding movement capability, firestopping performance, and ease of application. Ideal for large joints or complex penetrations, this gun-grade formula is GREENGUARD Gold certified for safe use in sensitive environments.
Key Benefits
- Firestopping Code Compliant: Designed for use in UL-tested and compliant firestop systems for both joints and penetrations.
- Self-Leveling: Easily gun-applied and self-levels for smooth, professional installation.
- Faster Installation: Ideal for larger joints or assemblies with multiple penetrations.
- Sensitive Environment Use: GREENGUARD Gold certified for indoor air quality in healthcare and educational facilities.
- Washout Protection: Resists degradation from washout exposure during application.
- Excellent Movement: Accommodates ±33% joint movement.
- Gun-Grade: Easily applied with conventional caulking equipment.
Best For
- Fire-rated concrete
- Gypsum wall assemblies
- Perimeter fire barrier joints
- Floors and ceilings
- Cables and cable trays
- Metal and plastic pipe
- Ducts
Product Properties
| Property | Specification |
|---|---|
| Application Temperature | 40 to 90 °F (4 to 32 °C) |
| Movement Capability | ± 33% |
| Skin Time @ 75°F & 50% RH | 15 minutes |




