PROMASEAL® Switchbox IntumescentGeneral Description
Separating walls form a fire barrier between compartments. However, recessed switchboxes often need to be installed in fire resistant dry wall or masonry structures. The recessed installations thus jeopardise the fire barrier function of the compartment wall.
Standard switch boxes compromise the fire resistance of walls. When incorporated with the PROMASEAL® Switchbox Intumescent (SX) provides a fire resistant performance to maintain the integrity of the compartment wall in which they are installed. To date the product has been successfully tested and assessed in accordance with AS 1530: Part 4 and BS 476: Part 20 for fire resistance up to 120 minutes.
PROMASEAL® Switchbox Intumescent is supplied as pads in modules of 70mm x 70mm x 8mm thick. Other dimensions are available on request.
During a fire, the switchbox plate will disintegrate causing fire to enter the dry wall cavity, resulting in premature failure. The fire resistant intumescent pad expands when this happens, creating an effective seal against ingress of fire and heat, thus preserving the fire resistant performance of the dry wall construction.
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