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Use Bostik Fireban® One for: Sealing fire rated joints in concrete, masonry, and wall systems where durable, flexible sealing is essential
Bostik Fireban® One is a premium, one-part, fire rated intumescent polyurethane sealant designed for sealing joints in a variety of construction substrates. Engineered for Australian conditions, it withstands up to 4 hours of fire exposure, resists weathering, and supports joint movement of ±25%. Ideal for use on concrete, brickwork, plasterboard, and fibre cement, it cures to form a durable, flexible seal. With easy application and excellent adhesion, Fireban® One is perfect for both fire and acoustic-rated joints in commercial, industrial, and residential projects.
Key Features of Bostik Fireban® One
- Fire rated up to 4 hours for critical safety compliance
- Acoustic rated for sound insulation in wall and floor systems
- One component formula – no mixing, easy application
- Excellent durability and UV/weather resistance for outdoor use
- Paintable and non-staining for seamless finishes
- Low modulus and supports joint movement of ±25%
Technical Overview
- Chemical Properties: Intumescent Polyurethane
- Application Temperature Range: 5°C to 35°C (41°F to 95°F)
- Service Temperature: -40°C to 70°C (-40°F to 158°F)
- Cure Rate: 2mm per 24 hours on porous substrates
- Tensile Strength: >1.3 N/mm²
- Elongation at Break: >900%
Trade Professional Information
- Required Tools: Sausage barrel gun, spatula or trowel, Bostik primers (N49, N40)
- Trade-Specific Tips: Use backing rods for correct sealant geometry; tool sealant to achieve concave profile
- Common Issues and Solutions: Avoid premature water exposure during curing to prevent failure; always prime for maximum performance
Storage and Shelf Life
- Storage Requirements: Store between 5°C to 30°C in a cool, dry, ventilated space
- Shelf Life Information: 12 months from date of manufacture in original unopened packaging
- Temperature Considerations: Protect from direct sunlight and extremes of temperature
Certifications
- AS 1530.4-2014 – Fire resistance certification
- ASTM C920 – International standard for sealant performance
- AS1157-1972 – Resistance to fungal growth
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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