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DOWSIL™ Firestop 400 Sealant

A one-part, intumescent acrylic sealant that offers good adhesion to a wide variety of substrates without the need for a primer. Its intumescent qualities allow the material to swell under high-temperature, producing a fire and smoke-resistant seal.

Uses:

  • Internal perimeter pointing around door and window frames, where the integrity of fire walls needs to be maintained.
  • Linear joints in fire rated walls 

Benefits:

  • Up to four-hour fire rating 
  • Paintable water-based sealant 
  • Swells under heat conditions to produce a fire- and  smoke-resistant seal 
  • Ready to apply
Illustration of DOWSIL™ FIRESTOP 400 Acrylic Sealant

Fire-rated paintable seals for interior walls and gap sealing

How can we limit the spread of fire when it comes to building design? Including passive fire-protection in the building design helps contain fire and smoke, allowing more time for building occupants to escape. This is why building materials we select are so vital: the materials’ behavior in resisting fire is a key factor in determining how much time will be available to exit a building. Dow High Performance Building offers a range of DOWSIL™ brand solutions for vertical and horizontal applications as well as cable penetrations, fenestrations and building element connections, including DOWSIL™ FIRESTOP 400 Acrylic Sealant.

Sealants can help limit the spread of fire and smoke. DOWSIL™ FIRESTOP 400 Acrylic Sealant is designed for internal perimeter jointing around door and window frames, where the integrity of fire walls need to be maintained and for linear joints formed in and between fire rated walls. This product offers several key benefits for helping prevent the spread of fire: a fire rating of up to four hours, swelling under heat conditions to produce a fire- and smoke-resistant seal and no emission of halogenated by-products under fire conditions.

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DOWSIL™ Firestop 400 Sealant
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DOWSIL™ Firestop 400 Sealant
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