Dow Corning Firestop 400
For internal perimeter pointing around door and window frames, where the integrity of fire walls need to be maintained, and in the small joints formed where fire rated partition sections meet.
Dow Corning Firestop 400 Acrylic Sealant is a one-part, fire rated intumescent acrylic sealant designed for internal perimeter pointing of fire rated door and window frames, where the integrity of fire walls or partitions need to be maintained. It has good adhesion to a wide variety of substrates without the use of primer. It has intumescent qualities which enable the material to swell under heat conditions producing a fire and smoke resistant seal. Dowsil Firestop 400 Acrylic Sealant does not emit halogenated byproducts under fire conditions.
• A fire rating of up to 2 hours can be achieved
• Class 2 surface spread of flame classification
• Mean toxicity index 2.0
• Good unprimed adhesion to most common construction substrates
• Remains flexible
• Easy to use, one-component sealant
• Resistant to ozone, ultra-violet radiation and temperature extremes
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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