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BOSTIK FIREBAN ONE Fire Rated Polyurethane Joint Sealant


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Product Description

BOSTIK FIREBAN ONE Fire Rated Polyurethane Joint Sealant, one-component, low modulus, curing via air humidity to form a soft, elastic, fire rated, weatherproof seal that is specifically designed for sealing construction joints and perimeter joints in fire-rated structures. It has been tested and certified to meet the requirements of AS1530.4:2014 and AS4072.1:2014.

This sealant is suitable for use in a wide range of construction applications, including sealing joints in concrete floors and walls, sealing gaps between concrete and metal, and sealing joints in precast concrete panels. It is also suitable for use in applications where a high degree of movement is expected, as it has excellent flexibility and durability.

BOSTIK FIREBAN ONE Fire Rated Polyurethane Joint Sealant is easy to apply, cures quickly, and can be painted over once it has fully cured. It is also resistant to water, oil, and most common chemicals, making it a versatile and reliable solution for fire-rated joint sealing applications.

Approvals & Standards

  • TEST CERTIFICATION – AS 1530.4-2014, AS4072.1 and BS476-20 REF: CSIRO FLO 1785 and BOS S.02.
  • ISO 11600-Class F-25LM.
  • EXTERNAL JOINT SEALANT – ASTM C.920-87 & 98 (USA) as Type S, Grade NS, Class 25, use NT, G, A, M, & O
  • BOMBA MALAYSIA – Approved


  • High durability
  • Excellent weathering resistance 
  • Can be painted over
  • Excellent acoustic ratings (up to 45 STC)
  • 50% total joint movement
  • Australian made
  • Non-staining
  • Does not support fungal growth

Areas of Application

For sealing joints where a high performance fire rated sealant is required in areas such as :

  • Penetration and core hole sealing in conjunction with fire collars or pillows.
  • Expansion and construction joints in precast, insitu concrete, block and brick work.
  • Marble, granite, GRC, CFC facades and external clading.
  • Intumescent sealing.
  • Acoustic jointing.

Note : The product’s design and performance, its intended use, installation and final confirmation and approval for use, must be provided by the project’s Design Engineer and Project Manager.

Physical Properties

Refer to the Product Brochure for details.

Typical Allications

Refer to the Product Brochure for details.

Typical Installations

 SURFACE PREPARATION – Clean and dry all surfaces by removing foreign matter and contaminants such as laitance, oil, dust, grease, frost, water, dirt, old sealants, curing agents and any protective coating. Dust and loose particles should be vacuum cleaned.

PRIMING – Priming of all surfaces is recommended to achieve stated performance properties. DO NOT USE METHYLATED SPIRITS OR TURPS.

APPLICATION – Apply Bostik Fireban One in a continuous operation using enough pressure to
properly fill the joint. Tool off the surface of the sealant with an appropriately sized spatula or trowel. Apply sufficient pressure to leave a smooth, consistent surface and ensure maximum contact with the interface of the joint.


Refer to the Product Brochure for details.


Not recommended for:
Use in chlorinated water such as swimming pools, spas etc.

  • Use on any material containing bitumen
  • Constant immersion in salt water
  • Use in glazing applications
  • Application to cement based substrates within 28 days of initial pour or set
  • Use in trafficable joints greater than 10mm in width
  • Application at temperatures below +5°C or above +35°C
  • Exposure to water and/or alcohol before it has completely cured
    Wet tooling techniques, such as soapy water
  • Application in less than 6mm in width and depth

Storage & Shelf Life

Store in cool (between +5°C to +30°C) dry, well-ventilated area out of direct sunlight. Store away from oxidizing agents and acids. The shelf life is up to 12 months in un-opened condition and if stored as per recommendations.

Health & Safety Information

As with all construction chemical products caution should be exercised. Protective clothing such as gloves and goggles should be worn. Treat any splashes to the skin or eyes with fresh water immediately. Should any of the products be accidentally swallowed, do not induce vomiting, but call for medical assistance immediately.

In confined spaces or in still air conditions, the use of a ventilation fan or suitable respirator should be used, and the advice and approval of the Site Safety Supervisor is essential. For further information or advice on health and safety precautions, safe handling, storage and correct disposal of products, please refer to the most recent product Safety Data Sheet (SDS), which is available upon request.


The information and the recommendations relating to the application and end use of this product are given in good faith and are based on the information provided by the manufacturer of the product and/or the Company’s current knowledge and experience in connection with the product when properly stored, handled and applied under normal conditions and no liability of final function at the job site is assumed. In practice, the differences in materials, substrates and actual site conditions are such that no warranty in respect of merchantability of, or fitness for, particular purpose, nor any liability arising out of any legal relationship whatsoever, can be inferred either from this information, or from any written and/or oral recommendations, or from any other advice offered by the Company. The Company also has no express or implied knowledge of any particular purpose for which the product is required and any such information given will not be taken into account in the supply of this product. No responsibility or liability by the Company will be accepted for misuse, misreading or derivation from recommended guidelines in respect of this product and the user shall determine the suitability of the product for his intended use and assume all risks and liability in connection therewith. The information contained in our brochure may change at any time without notice. Any use of this product,  Bostik Fireban One, in any application should be approved as suitable for use/application by the Design Engineer and Project Manager.