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Intumescent Sealants & Mastics

Intumescent sealants, also known as fire mastics, reinforce the fire resistance of walls, floors and door frames by sealing linear gap joint seals and metallic pipe penetrations. 

 

Fire Seals Direct stocks some of the most trusted intumescent mastic sealant brands, including Lorient, Corofil, FSi, Pyroplex, all of whom meet the most stringent British and EU regulatory standards.

 

Acrylic intumescent sealants expand to fill a cavity when subjected to extreme heat and provide an extra layer of fire-resistant material to protect the structural integrity of a building.

 

Whether you’re searching for standard fire mastic or high expansion sealants, our range of fire sealants is sure to meet your requirements. Read more about fire-resistant materials to help slow down the spread of fire in buildings. 

 

Visit our Advice Centre for comprehensive guides to intumescent sealant, including when not to use it in favour of fire-rated foam, or give our technical helpline a call for free, impartial advice.

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