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Intumescent Seal
Mar 17, 2017

Clearances around the four sides of a fire door leaf are essential – it’s the only way the door can operate effectively. But these clearances create a point of weakness, which fire will readily exploit, if left un-sealed these gaps allow lethal smoke and hot gases to flow through unimpeded.

our range of intumescent seals protect these clearances. In the event of fire the intumescent core expands 5-8 times its original size sealing the gap and providing an effective barrier to fire and hot smoke.

Most of the intumescent seals shown in this section are multi-functional as they incorporate integral smoke seals - offering comprehensive protection against fire, ambient and elevated temperature smoke.


Shanghai Heya Decoration Materials Co., Ltd. is a company integrated in development, production and sales of different kinds of doors,windows and wall’s sealing products.Our Company is specialized in door and window weather stripping,door bottom sweep,3M silicone rubber sealing strip,TPE kerf weather stripping and caulk strip.we have international advanced technology and production equipment, provide a complete solution for family and industrial building sealing in doors and windows.


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