TREMstop® Fyre-Sil

A neutral-cure, silicone sealant designed for use in firestop applications, including both joints and through-penetrations that will self level.

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