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Bostik Fireban One is a professional-grade intumescent polyurethane sealant specifically engineered for fire-rated expansion joints in concrete, masonry, and high-rise facade assemblies. It combines a certified 4-hour fire barrier with a low modulus formulation that accommodates 50% total movement (± 25%), ensuring the seal remains intact during extreme structural expansion and contraction without tearing.
Fully compliant with AS 1530.4-2014 and acoustic-rated, this thixotropic paste provides critical protection against fire, smoke, and noise transfer in high-stakes commercial and residential partitioning.
Frequently Asked Questions About Bostik Fireban® One
Q: How should Bostik Fireban® One be applied for best results?
A: Ensure surfaces are clean and dry, apply recommended primer, then dispense using a sausage barrel gun. Tool off to a concave finish for optimal sealing.
Q: How does it perform under extreme conditions?
A: Fireban® One remains durable under UV exposure, weathering, and supports joint movement of ±25%, making it suitable for Australian outdoor environments.
Q: Is it compatible with painted surfaces and coatings?
A: It can be painted after 7 days; however, solvent-based coatings may react. Conduct a field test for coating compatibility before full application.
Q: What if the sealant is exposed to water before curing?
A: Exposure to water or alcohol during curing can compromise performance. Always allow full cure—7 days—for optimal sealing strength and durability.
Q: What safety precautions should I follow?
A: Wear gloves, eye protection, and ensure good ventilation. Avoid skin contact and inhalation. Refer to SDS for full safety guidelines and emergency actions.
Use Bostik Fireban® One for:
- Fire-rated joint sealing in concrete structures
- Acoustic rated wall systems for sound insulation
- Weather-resistant joint sealing for external walls
Why Use Bostik Fireban® One:
- Ensures safety with up to 4-hour fire resistance
- Reduces sound transmission for acoustic comfort
- Quick and easy application saves time on site
How to apply Bostik Fireban® One:
- Clean and dry all surfaces thoroughly
- Apply primer (N49 for porous, N40 for non-porous) as needed
- Insert backing rod to correct joint depth
- Dispense sealant with a sausage gun and tool off for smooth finish
- Allow to cure for 7 days before painting or exposure to moisture
Bostik Fireban® One limitations:
- Not suitable for swimming pools or constant saltwater immersion
- Do not apply to bitumen-based substrates
- Not for glazing applications or joints under 6mm width/depth
- Avoid use in trafficable joints over 10mm width
Safety precautions when using Bostik Fireban® One:
- Personal Protective Equipment: Gloves, eye protection, and respirator if ventilation is inadequate
- Ventilation: Use in well-ventilated areas to avoid inhalation
- Handling: Avoid skin contact and inhalation; clean up uncured material immediately
- Keep out of reach of children; refer to SDS for full safety info
Bostik Fireban® One can be used on the following substrates:
- Insitu concrete – ensure surface is clean and dry
- Precast panels – prime for maximum adhesion
- Brickwork and blockwork – remove dust and contaminants
- Rendered masonry – use suitable primer
- Fibre cement sheets – suitable for fire and acoustic rated applications
- Plasterboard – ensure fire/acoustic rating where applicable
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