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Cavity Seals - Custom Sizes

Custom Size Cavity Seals.

Please fill in the form seen at the bottom of this page or click the contact links below to ask about custom width fire rated cavity seals and we will provide advice and a quote:

>> Please fill in and email us the interactive PDF form seen near the bottom of this page
>> email:
>> tel: 01329 841 416

Astro Clad PLUS

Astro Clad Plus offers an effective fire barrier for cavities over 50mm. The product has been successfully fire tested for up to 90 minutes fitted directly onto cement board. The product not only offers a superior fire rating but also allows a continuous ventilation space of up to 44mm. This provides excellent ventilation behind the external wall system, whilst leaving enough free space for the installer to easily install the facade panels after the ventilated fire barrier seal.

ventilated fire barrier

ventilated fire barrier with insulation


  • Finish:Custom cavity fire barrier width Encapsulated in red polythene
  • Size: Customer specifies the required size based on formula below 75mm x 1000mm x Total Cavity Width minus 44mm​​​​​
  • Maximum Air Gap: 44mm

Certification/Fire Test Reports:

  • Fire ratings:
  • 90 minutes fixed to cement board
Please Note: This product will NOT be dispatched until approved by our technical team. So this product may not apply for next day delivery.


We have technical representatives who provide assistance in the selection and specification of the products on this site and should be consulted for exact installation and product suitability. Ensure an early engagement with ourselves, designers, main contractor and specialist installers before any installation. Other trades and/or manufacturers may need to be consulted. For in-depth information, specification and technical advice please call our Head Office on Tel: +(0)1329 841416 or email


All interested parties, designer, specifier, main contractor and specialist installers should provide access to allow the fire stopping seals to be regularly inspected and maintained, as well as records kept of such maintenance at minimum periods of 12 months, as required by the Regulatory Reform Order, and repaired if necessary. Reference should be made to ASFP TGD 17 – Code of Practice for the Installation and Inspection of Fire Stopping.


It is vital that those entrusted to design or install a fire stopping product have the necessary levels of competence to undertake the task professionally and thoroughly. The level of competency required will be commensurate with the expected complexity of the building. All designers must eliminate, reduce or control foreseeable risks that may arise during installation, construction or maintenance when preparing or modifying designs. Clients should ensure that the principal designer and principal contractor carry out their duties under CDM regulations. The ASFP foundation course in passive fire protection provides essential knowledge as part of demonstrating competency and understanding in this key fire protection specialism.

Cavity Barrier order form:

Download and review any of the following information:

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