Fire rated silicone sealant being tested by torch

Fire Sealants and Fireproof Silicones

Innovative, protective firestop sealing solutions for fire-rated applications.

Meet fire codes without sacrificing performance

Fire-resistant sealants and adhesives from Dow help you design fire systems with confidence, ensuring that risks to buildings – and building occupants – are minimized. Designed to help limit the spread of fire, smoke and gases and meet building codes and regulations, fire-rated sealants:

  • Can be used for penetration seals, horizontal and vertical linear joints in walls and in floors as well as at the connection between walls and floors.
  • Help to isolate toxic gases, pollutants and other deleterious gases during a fire event.
  • Are non-flame propagating and do not produce flaming droplets.


Our fire-retardant solutions are available in selected countries. DOWSIL™ Sealants have been certified to both European and UL fire standards in a wide range of joint and penetration configurations including sealants for firestop systems described in the Products Certified for Canada.

Superior fire-rated silicone sealant performance

Count on Dow to support more than fire safety compliance – you also get the performance advantages of silicone sealants:

Sealants that outperform organic alternatives – lasting longer to avoid premature and costly renovations

Proven performance with success in a range of diverse applications

Flexibility and adhesion, even while being stretched or compressed

Outstanding life-cycle value 

Resistance to cracking, splits or tears

Technical service support from an industry leader

Featured fire-resistant silicone sealants

DOWSIL™ FIRESTOP 700 Silicone Sealant

A one-part, neutral curing silicone sealant that provides excellent unprimed adhesion to a range of common construction substrates including steel, masonry and brick.

DOWSIL™ Smoke Seal 800SL

This self-leveling, one-part silicone sealant has excellent unprimed adhesion on many common, non-porous building substrates. A low-modulus sealant, it has excellent fire sealing properties, adhesive strength and high movement capability, which can help prevent the spread of smoke and flames between horizontal floor joints.

DOWSIL™ 3-6548 RTV Silicone Foam

This two-part, room-temperature vulcanizing (RTV) foam has outstanding fire-resistant properties, coupled with an excellent movement accommodation capacity, providing a reliable safety solution. It has been specifically developed to withstand high temperatures and to confine such hazards as smoke, flames and gases. It can also be used to seal buildings against damaging contaminants.

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