PROMASEAL® Electrical Junction Sealconsists of Grafitex intumescent strips, sandwiched between a special compressible foam. It is a system that will prevent the spread of fire when inserted to steel trunking supported electrical cables that pass through compartment floors and walls.

PROMASEAL® Electrical Junction Sealhas been tested up to 120 minute fire resistance with electrical cable trunking in concrete/masonry floors or walls and lightweight partitions (with an equal or greater fire resistance level).

The electrical cable trunking must be within a maximum dimension of 200mm x 200mm and be constructed of minimum 0.5mm thick steel. All perimeter gaps around the outside between the trunking and the building element must be sealed.

When exposed to the heat from a fully developed fire, the Grafitex intumescent strips will expand to compress and eventually form a solid char plug around the electrical cables and inside the cable trunking, thus preventing the spread of fire along the cables and through the trunking.