GREAT STUFF™ Fireblock Insulating Foam Sealant is an easy way to provide fire protection by reducing air movement in your home. By sealing the annular space surrounding your pipes, cables and ducts, the rate and speed of flames, deadly gasses and toxic smoke are minimized. At the same time, it helps you conserve energy, reduce drafts and save on heating and cooling costs. GREAT STUFF™ Fireblock is a minimal expansion polyurethane insulating foam sealant that fills, seals and insulates gaps up to 1/2 inch. Like all GREAT STUFF™ products, it is polyurethane based and will not absorb water.
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Fills, seals and insulates gaps up to ½ inch
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Impedes spread of fire and smoke through service penetrations
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Recognized as an Alternate Fireblocking material for residential construction
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Tested according to ASTM E84, ASTM E814 (modified), UL 1715
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Bright orange colored foam for easy code identification
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Seals service penetrations between floors
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Seals electrical runs through wall studs
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Airtight, water-resistant
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Tack free in 6 minutes, trims in 30 minutes
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Cures rigid in 8 hours
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Exceptional adhesion to building materials
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One 12 oz. can = up to 19 tubes of caulk
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One 16 oz. can = up to 24 tubes of caulk
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All-direction dispensing
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UL Classified
Differences Between Latex and Polyurethane Foam Sealant
There are two key differences between latex foam and GREAT STUFF™ polyurethane foam sealant:
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Latex foams are typically "open cell" and, as a result, can take on water. In fact, the same properties that allow you to wash latex foam off your hands with water also mean that the cured foam can absorb water. This can cause wood rot or deterioration in areas where wet latex foam is next to wood, such as a window frame. In contrast, GREAT STUFF™ is a closed-cell foam. It forms a water-resistant outer skin when cured.
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Latex foam does not expand. GREAT STUFF™ expands to thoroughly fill all voids and cavities making it an ideal air sealant.
Related Information
Stop Air Leaks with GREAT STUFF™ Insulating Foam Sealants (2.5MB PDF)
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