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Everflex Fire-Fill Acrylic SealantVendor:
Everflex Fire-Fill is a water-based intumescent acrylic firestop sealant for fire-rated building joints and selected service penetrations through walls, floors and ceilings. Under fire exposure it expands to form an insulating char, helping restrict the passage of flames, hot gases and smoke through properly...- From $10.93
- From $10.93
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Adheseal HV Duct Acrylic SealantVendor:
Adheseal HV Duct is a high-strength acrylic HVAC duct sealant for high-velocity air ducts, sheet-metal seams, duct joints and dust extraction systems. It cures to form a flexible, paintable and dust-proof seal, making it a practical cartridge-applied duct sealing compound for air-conditioning, ventilation and...
- From $4.81
- From $4.81
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Sikaflex®-400 FireVendor:
A fire-rated joint is a tested assembly, not simply a bead of sealant. Sikaflex®-400 Fire is a one-component polyurethane sealant used in specified fire-resistant movement and connection joints where the complete construction detail meets the relevant tested configuration.Fire-rated building jointsUse this grey sealant for...- $24.09
- $24.09
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Bostik Fireban One Polyurethane SealantVendor:
Bostik Fireban One is an intumescent polyurethane sealant for fire-rated construction and movement joints in suitable concrete, masonry and wall-panel assemblies. It provides a flexible, weather-resistant joint seal, with fire resistance of up to four hours in tested configurations. The required rating must be...- From $16.73
- From $16.73
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Frequently Asked Questions
How do fire-rated sealants work?
Intumescent fire-rated sealants expand when exposed to heat, filling gaps to block fire and smoke. The Everflex Fire-Fill and Bostik Fireban One are intumescent products rated for up to four hours under AS1530.4 and AS4072.1.
What fire rating do these sealants achieve?
The Everflex Fire-Fill (acrylic) and Bostik Fireban One (polyurethane) each achieve up to a four-hour fire resistance rating under AS1530.4 and AS4072.1. The HV Duct carries an AS/NZS 1530.3 smoke development index for duct sealing.
Can fire-rated sealants handle joint movement?
Yes, movement capability varies by product. The SA Sealproof silicone handles ±50% movement. The Fireban One polyurethane handles ±25%. The Everflex Fire-Fill acrylic handles ±20%. The HV Duct acrylic is rated at ±5% for low-movement duct penetrations.
What is the maximum joint width for fire-rated sealants?
The Bostik Fireban One accepts joints up to 50 mm wide. Check the product data sheet for each fire-rated sealant, as maximum joint width and minimum backing depth affect the fire rating. Incorrect installation can void the fire certification.
What chemistry are fire-rated sealants?
Fire-rated sealants use different chemistry types. The Everflex Fire-Fill and HV Duct are acrylic-based. The Bostik Fireban One is polyurethane-based. The SA Sealproof is a low-modulus silicone. Chemistry type does not affect the fire resistance rating.