3C Firestop Silicone Sealant

3C Firestop Silicone
Type: Neutral cure, elastic silicone sealant (professional grade)
Flexibility: Allows up to 25% movement, meaning it stays flexible and won’t crack with expansion or shifting
Application: Easy to apply and smooth (“good toolability”)
 
Fire Protection
Fire-retardant: Helps slow the spread of fire
Tested to: EN1366-4:2010 (standard for fire resistance in joint seals)
Fire rating: Up to 4 hours (depending on how and where it’s applied)
 
Air & Building Performance
Air permeability certified: Meets EN13141-1
This means it supports proper ventilation—important for preventing moisture buildup and maintaining building health
 
Typical Uses
Sealing around:
Window and door frames
Internal/external joints
Service penetrations where fire protection is needed

It’s a flexible, fire-rated sealant designed to both protect against fire spread and maintain building movement and airflow performance—widely used in construction where safety and compliance matter.