Selleys Flame Flex Fire Rate Sealant Grey 435g

Selleys FlameFlex is a premium fire and acoustic rated sealant built on superior SMP (Silyl Modified Polymer) technology. Rated for fire resistance up to 4 hours, it provides a critical barrier in fire-rated construction joints and penetrations while also delivering acoustic sealing performance — making it an essential product for compliant building and renovation work.

Supplied in a 435g cartridge (Grey), FlameFlex adheres to wet or damp surfaces without requiring a primer, and is suitable for both interior and exterior applications. Its superior UV resistance ensures long-term durability in exposed conditions, and the paintable finish means it integrates seamlessly into any surface. A reliable, high-performance sealant for fire-rated walls, floors, ceilings, and service penetrations.

Key Features

• Fire rated up to 4 hours
• Acoustic rated — reduces sound transmission through joints
• SMP technology — superior flexibility and adhesion
• Adheres to wet or damp surfaces — no primer required
• Superior UV resistance for long-term durability
• Paintable straight from application
• Suitable for interior and exterior use

Specifications

• Size: 435g cartridge
• Colour: Grey
• Technology: SMP (Silyl Modified Polymer)
• Fire rating: Up to 4 hours
• SKU: 100561