Intumescent Gaskets

Description

An intumescent gasket fitting into BESA boxes, universal conduit boxes and plug or switch boxes, designed to comply with British Standards and IEE Regulations. Where socket outlets or switches are back to back in fire walls with cable or conduit passing tthrough walls, gaskets must be fitted inside these boxes to stop the passage of fire, and ALL boxes in plasterboard partitions MUST HAVE GASKETS FITTED, whether plastic or metal boxes. Where steel conduits pass through firewalls or floors, it is essential to terminate each side of the wall or floor slab with a BESA box or universal conduit box. Envirograf® intumescent gaskets fit into the back of the box, stopping the passage of fire and smoke from one compartment to the other.

ADVANTAGES

• Solutions for both plastic and metal boxes, providing up to 4 hours protection- Compatible with single or double socket or switch boxes, BESA boxes, universal conduit boxes and ceiling roses
• Complies with IEE Wiring Regulations, bringing standard boxes in line with Document B

FIRE TEST PERFORMANCE

Gaskets tested to BS476 Parts 20 & 22, achieving up to 4 hours fire protection in metal boxes.

Gaskets tested to EN1365-2 (1999), NEN6069 (2005), and EN1364-1 (1999), achieving up to 84 minutes protection in plastic boxes.

Acoustic fire and sound trap linings tested to BS476 Part 22 (1987), achieving 4 hours protection in solid walls and 71 minutes in cavity walls.

Acoustic criteria tested to BS476, Parts 20/22, EN 1364-1 (1999) & EN 1365-2 (1999).

APPLICATION INSTRUCTIONS

Intumescent gaskets are essential in metal or plastic boxes where cables pass back through a wall. Gaskets must be fitted to all dry lining boxes in partition walls. Without these gaskets fire can spread into the partition within 4-5 minutes. Where cables run through back to back boxes in brick or block walls, flames can pass through within 6 minutes, resulting in a wall or partition only 6 minutes of fire integrity.  Gaskets for use inside metal or plastic boxes are made to the size of the box and come with self-adhesive fixing on the back. Once the backing paper has been peeled off the fixing strip, the gasket can be adhered to the inside of the box. Holes can be cut into the gasket with a sharp knife to receive cables, or the gasket can be cut to fit the back of the box if cables are already fitted. Dry lining boxes in walls have two pads per box, made to size and adhered top and bottom. Plasterboard ceiling rose boxes can be protected by means of an intumescent cover which folds up and is passed through the hole in the ceiling. A hole is then cut in the cover to receive the cables, which are then pulled through the cover, box and ceiling before connecting the ceiling rose.  Ceiling rose gaskets to fit over the ceiling rose or hook plate should be fitted where more than two cables pass through the ceiling. A hole is made in the gasket through which the cables are passed. The backing paper of the self adhesive fixing strip is then peeled off and the gasket is adhered to the ceiling. The pendant or light fitting can then be fitted.

DOWNLOADS

Please use the links below to download relevant information as PDF documents:

Technical Information

TD030-03-2013

TD030 Standard-11-2013

TD030 Rubber-11-2013

Application Instructions

AP030-03-2013

COSHH Data

HS030 Standard-11-2013

HS030 Rubber-11-2013

ORDER REFERENCES

GASKETS FOR STANDARD METAL BOXES 

ACOUSTIC & FIRE PROTECTION FOR STANDARD METAL BOXES 

GASKETS FOR DRY LINING BOXES 

GASKETS FOR MULTIMEDIA BACK BOXES

NEW ENVIROGRAF® BLACKBOX GASKET – 100 Minutes Fire Integrity

SHALLOW & DEEP DRY LINING BOXES (35mm or 44mm DEEP) COMPLETE WITH INTUMESCENT GASKET(S) 

FIRE AND SOUND TRAP FOR ELECTRICAL BOXES

The Envirograf® Product 30 range has been extended with a range of Fire and Sound Traps (FST acoustic and fire protection sleeves for electrical boxes). These have integrated intumescent material for use in timber-framed houses, etc. The FST products are easy to install and they will fit all cavity depths, for single/double, shallow/deep switch/socket boxes.

EXTERNAL

* The two products above are supplied with fixing pins. No pins are necessary for the internal products shown below.

INTERNAL

SEE ALSO PRODUCT 110 FIROBLOK INTUMESCENT CONDUIT SLEEVES