Astro FRA Intumescent Socket Box (Cover)

Tax included.

Key Features

  • Easy to install putty pad alternative
  • Pre-formed inserts to fit common metal and plastic socket box types
  • BS EN 1364-1 rated for fire resistance and soundproofing.

Key Points:

  • Easy to install putty pad alternative. Pre-formed covers to fit most electrical switch boxes.
  • BS 476 Fire Tested for 120 Minutes.
  • Tested for minimal acoustic noise transfer or air movement.
  • Suitable and tested with plastic back boxes, also suitable for steel back boxes.
  • Available for single and double sockets.
  • Pre-formed for easy installation can be installed in seconds.
  • No maintenance SBC should not move or become damaged if the socket is replaced, if fitted correctly.
  • Mess free installation no need for adhesives, screws or drilling.
  • Can be retrofitted.


Switch boxes, in walls subject to fire regulations, must be correctly fire protected. Once a hole is made in the wall for a recessed switch or socket box, the fire integrity of the construction is compromised.

Astroflames Socket Box Covers are manufactured from halogen free, low smoke, intumescent mineral fibre material and are designed to reinstate the fire performance of partition (stud) wall constructions when penetrated by steel or plastic electrical socket back boxes.

The cover will also provide resistance to the passage of sound and air movement. In the event of a fire the Astro FRA Socket Box Cover intumescent material will expand to enclose the electrical back box and cables, providing effective fire resistance, for integrity and insulation for 60 or 120 minutes depending upon the partition (stud) wall construction.


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.