FAQs

Selecting the correct fire-rated sealants for a fire door installation is essential to maintaining the fire performance of the door assembly and helping to prevent the spread of fire and smoke.

When sealing gaps between the fire door frame and the surrounding wall, it is important to use products that have been tested in fire door assemblies and comply with the recommendations of BS 8214:2016.

When choosing a fire-rated sealant, check that:

• Fire-rated mastics have been successfully tested as a linear gap seal in accordance with BS 476-20 or BS EN 1366-4 for the required fire resistance period.
• Fire-rated expanding foams have been successfully tested as a linear gap seal in accordance with BS 476-20 or BS EN 1366-4 and provide a minimum of 30 minutes fire resistance.
• The sealant has been included within a fire test between the door frame and surrounding structure on a timber-based fire door assembly tested in accordance with BS 476-22 or BS EN 1634-1.

If a product does not provide this information, you should request the relevant fire test evidence and certification before specifying or installing it.

FAS Fire Door Foam™ and FAS Fire-Rated Acrylic Sealant have been independently tested for use in fire door assemblies and are Certifire approved under certificates CF5839 and CF5840. When used individually, both products can provide up to 60 minutes of fire protection. When used together as a tested system, they can achieve up to 120 minutes of fire resistance.

Typical applications include:

• FAS Fire Door Foam™ for gaps up to 25mm to achieve up to 60 minutes of fire protection.
• FAS Fire-Rated Acrylic Sealant for gaps below 5mm to achieve up to 60 minutes of fire protection.
• A minimum 10mm cap of FAS Fire-Rated Acrylic Sealant over FAS Fire Door Foam™ to achieve up to 90–120 minutes of fire protection.
• Installation with standard packers as part of the tested system.

FAS Fire Door Foam™ also replaces the need for mineral fibre wool, helping to reduce installation time by approximately 12 minutes per doorset installation.

For further technical advice on selecting the correct fire door sealants, please contact our team on 0121 521 2179 or [email protected].

FAS Fire Door Foam™ is a fire-rated expanding foam designed to simplify fire door installation and fire-stopping applications. Compared to traditional stone mineral fibre wool, it offers a quicker and more cost-effective installation method, helping to reduce labour time and overall project costs. When used with FAS Fire Door Intumescent Acrylic Sealant, it forms part of a tested fire door sealing system for perimeter gap sealing around fire door frames.

Architraves are optional, Fire Door Foam™ has been tested with and without.

FAS Fire Door Foam™ has a shelf life of up to 18 months when stored unopened in recommended conditions between 5°C and 30°C. To maintain the performance of the fire-rated expanding foam, cans should be stored in a cool, dry environment and protected from excessive heat, frost and direct sunlight. Correct storage helps ensure the product performs as intended for fire door installations, perimeter gap sealing and fire stopping applications.

A 750ml can will seal 3-4 single doors within a standard structural opening (10mm x 70mm void).

Yes, Fire Door Foam™ has sound reduction capabilities of up to 60 dB Rw.

Yes, FAS Fire Door Foam™ can be used in applications where smoke control is required. The product has smoke leakage test evidence in accordance with BS EN 1634-3: 2004, demonstrating its suitability for use as part of a tested fire and smoke sealing system. In addition to providing fire resistance around fire door frames, FAS Fire Door Foam™ helps maintain compartmentation by restricting the passage of smoke through perimeter gaps between the door frame and surrounding wall. Always refer to the relevant certification, test evidence and installation guidance to ensure the product is suitable for your specific fire door application.

FAS Fire Door Foam™ provides a faster and more cost-effective alternative to traditional fire door installation methods that use stone mineral fibre wool and fire-rated mastic. Designed specifically for sealing gaps between fire door frames and surrounding walls, the fire-rated expanding foam helps reduce installation time while maintaining tested fire performance.

Compared with traditional mineral wool and mastic systems, FAS Fire Door Foam™ can help simplify installation, reduce labour time and improve efficiency on site. It is also compatible with standard plastic and timber packers and has been tested for use in fire door assemblies.

Alternative methods for sealing perimeter gaps around fire door frames include:

• Stone mineral fibre wool with fire-rated mastic
• Fire-rated acrylic sealants
• Other tested fire-stopping systems approved for fire door installations

When selecting a fire-stopping solution, always ensure the product has been tested and certified for use within the specific fire door assembly and application.

Yes, FAS Fire Door Foam™ has been fire tested for use with and without architraves as part of a tested fire door installation system. This provides flexibility when installing and finishing fire door frames, allowing the product to be used in a variety of fire door applications whilst maintaining the tested fire performance of the assembly. Always ensure installation is carried out in accordance with the relevant certification, fire test evidence and installation guidance.

FAS Fire Door Foam™ is a fire-rated expanding foam that has been extensively tested for use in fire door installations and perimeter fire-stopping applications. The product has been fire tested to provide up to 60 minutes of fire resistance in timber and composite doorsets and timber glazed screens in accordance with BS 476: Part 20 & 22: 1987 and BS EN 1634-1. When installed in conjunction with FAS Fire Door Intumescent Acrylic Sealant or FAS Fire Door Silicone, the system has been tested to achieve up to 120 minutes of fire resistance. Please refer to the installation guidance available on the Fire Door Foam™ product page for approved installation methods and tested configurations.