Astroflame Passive Fire Protection Products

Trade Name: ASTRO FRA Socket Box Cover

Intumescent Fire & Acoustic Socket Box Cover

Easy to install putty pad alternative. Pre-formed covers to fit most electical switch boxes

Tested to BS 476 Part 20 for up to 120 minutes.

Tested to & BS EN 1366-3 60 minutes

Prevents or delays fire from entering a wall cavity and attacking the building structure.

Simple and fast mechanical fixing, no adhesives, scews, drilling or mess.

Replaces time consuming plasterboard lining of sockets / switches.

Can be retro fitted to existing sockets / switches or fitted during wall construction.

The switch / socket box can be removed without disturbing or replacing the cover.

Effective acoustic barrier to both impact and airborne sounds. Acoustic Rating up to -67 dB.

Intumescent Fire & Acoustic Socket Box



Socket box components.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.

In addition the wall's capacity to provide an effective acoustic and thermal barrier is impaired. For timber framed buildings preventing a fire from entering wall cavities and attacking the structure is critical to the overall fire integrity of the building.

To combat these fire risks Astroflame has developed a pre-formed socket / switch box cover to provide fire and acoustic protection as an easy fit alternative to conventional putty pads.

This one-piece socket box is available in sizes to suit most common single & double electrical boxes and restores and maintain fire insulation and integrity in plasterboard walls for up to 120 minutes.

In a fire the cover expands, filling all of the available space with a fire resistant highly insulating char. The fire is unable to penetrate the aperture and the socket cover is able to give additional insulation protection to the wall void by reducing the chance of heat build up leading to the ignition of flammable structural members.

The socket cover also reduces the transmission of noise and has a certified acoustic rating (see below).

In a wall with two layers of plasterboard on each face, the ends of the fixing wires can be pushed between the plasterboard layers.


Single or Double Socket sizes / one per box or boxes of 10 per size

Single size cover dimensions: 90mm x 90mm x 50mm deep
Double size cover dimensions: 160mm x 90mm x 50mm deep

To order & specify


Typical wording


Fire Test and Assessment Reports

Tested for use in plasterboard partition walls.

Fire Rating: BS 476 - EI120 mins | EN 1366-3 - EI60 mins.

Acoustic Testing: BS EN ISO 140-3:1995 and BS EN ISO 717:1977
Acoustic Rating up to 67 dB.


Health and Safety

See COSHH Sheet.


Please refer to our install sheet

For additional testing, or technical information please contact ASTROFLAME FIRESEALS LTD.

Issue 04/13


As part of our policy of ongoing improvements, we reserve the right to modify, alter or change product specifications without giving notice. Product illustrations are representations only. All information contained in this document is provided for guidance only, and as ASTROFLAME FIRESEALS LTD has no control over the installation methods of the products, or of the prevailing site conditions, no warranties expressed or implied are intended to be given as to the actual performance of the products mentioned or referred to, and no liability whatsoever will be accepted for any loss, damage or injury arising from the use of the information given of products mentioned or referred to herein.

The above information to the best of our knowledge is true and accurate and based upon current test data and is supplied for your guidance only. Customers should satisfy themselves to the suitability of the product in its intended use and no guarantee is given or implied since the conditions of actual use are beyond our control. ASTROflame (Fireseals) Ltd, disclaim any liability for loss, damage or other expense arising from the use of information, data or products mentioned or referred to and reserve the right to change any details or specifications without notice.


Astroflame (Fire Seals) Ltd. Intumescent House
Unit 8, The IO Centre, Stephenson Road, Segensworth
tel 0800 023 2482
(01329 844500)
fax 0800 023 2483
(01329 844600)
tel +44 1329 844500
fax +44 1329 844600



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