Firestop Sealant

JR-Firestop 2K is a high-performance two-component neutral-curing silicone firestop sealant.

After mixing according to the specified ratio, it cures into a durable elastic rubber with excellent fire resistance, smoke sealing and acoustic insulation performance. It provides strong adhesion to glass, metals, concrete, masonry and plastics without requiring primer.

When exposed to high temperature or flame, the sealant expands up to 25 times its original volume and forms a dense char layer, effectively preventing the spread of fire, smoke and toxic gases through penetrations.

Key Features

• Fire Resistance Performance:Provides reliable fire protection with intumescent expansion.
• Smoke Tightness:Blocks smoke and toxic gas transmission through joints.
• Acoustic Insulation:Improves sound insulation performance.
• Wide Substrate Compatibility:Adheres to glass, metals, concrete, masonry and plastics without primer.
• Environmental SafetyMeets UL94 V-0 requirements and ROHS / REACH standards, free from halogens and VOCs

Applications

Building & Construction

Fire compartment walls and floors, penetration seals around cables, cable bundles, conduits, combustible pipes, metallic pipes with insulation, and HVAC ducting. Suitable for fire doors, chimneys, and ventilation shafts.

New Energy & Energy Storage

Sealing of battery pack enclosures, energy storage cabinets, and power module housings requiring fire protection and thermal management. Provides flame retardant barrier and moisture ingress protection for EV battery packs.

Industrial & Electrical

Potting and encapsulation of electronic components, transformers, and power supplies requiring flame retardant sealing. Suitable for motor, automotive electronics, power tools, instruments, and PCB protection.

Marine & Transportation

Fire-resistant sealing of bulkheads, deck penetrations, and cable transits in ships and rail vehicles.