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 electrical switch boxes

Tested to BS 476 Part 20 for up to 120 minutes

Tested to BS EN 1366-3 60 minutes (*bespoke size, single EU socket only)

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 Socket Box Covers at Astroflame

View a range of styles

>> See more : Additional product images

>> Call us to order: 01329 844 500

>> Email us to order:


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.

Product Availability

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

Product Code

Product Description

Internal Depth

Internal Dimensions
W x H


Astro FRA Socket Box Cover Single




Astro FRA Socket Box Cover Double



To Order & Specify

Please contact us and quote the following - Quantity / Product Code / Product Description / Size
Typical example:- 10 / AFFRASOCS / Astro FRA Socket Box Cover Single / Single

>> Tel: 01329 844 500 or >> Email:

Test and Assessment Reports

Tested for use in plasterboard partition walls.
Tested to BS 476 Part 20 for up to 120 minutes.
Tested to & BS EN 1366-3 60 minutes (*bespoke size, single EU socket only).
Acoustic Tested to BS EN ISO 140-3: 1995 and BS EN ISO 717-1: 1997.


For further information on installation requirements please contact the technical team on: tel 01329 844 500
or email

Health and Safety

The product does not present any known health hazards during or after installation. Normal good industrial and personal hygiene practices should be observed. For further information on health and safety requirements please contact the technical team on: tel 01329 844 500 or email

Web Page


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



Email Astroflame