Fire Protective Gap-Seals


KBS® Fire Protection gap seals allow construction elements to move at same time ensuring tightness of the gap towards flames and smoke.




KBS® Fir-A-Flex
KBS® Fir-A-Flex is a permanently elastic fire protective gap sealing system for joint widths of 20 mm and more – with and without movement.

KBS® Fir-A-Flex elements consist of permanently elastic foam combined with flexible intumescent material. KBS® Fir-A-Flex allows for movement of the joints up to 60 % and can be installed on one side or on both sides of the gap. Joints up to a width of 100 mm have been tested and approved.


KBS® Fir-A-Flex 501
KBS® Fir-A-Flex 501 reliably seals gaps up to a width of 30 mm. – with and without movement. KBS® Fir-A-Flex 501 can cope with movements of up to 30 %.

KBS® Fir-A-Flex 501 gap seals are combinations of a silicone mastic and a backer, whereby the backer can - at ones option - consist of either mineral fibre or a polyethylene foam backer rod.




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