IF60 is a 60 minute fire seal, which provides primary protection for single and double leaf, single and double acting fire doors. It is also used in conjunction with IMP seals at the meeting stiles on double doors.
The seal is extruded from aluminium alloy and contains two reservoirs, each having substantial reserves of Sealmaster intumescent material.
In new doorsets, the seal is rebated into the head and jambs of the door frame, and is aligned with the centre of the door edge. The seal is interrupted at the hinges and lock/latch plate positions, and protection at these points is provided by Sealmaster intumescent plugs.
When heat from the fire reaches the IF60 seal, the intumescent material foams, swells and fills the gaps around the door and door frame. As the foam remains soft during the period of intumescent action, it has the ability to re-seal the gap, should the door warp or be moved for any reason.