Spray In Foam Sealant Around Dryer Vent
Around pipes, wires, exhaust fans, and ducts: Gaps of inch or less can be sealed with fire-blocking caulk (3M Fire Block Sealant, $6.57 for 10.1 ounces; homedepot.com); seal larger ones up to inch with fire-blocking spray foam (Great Stuff Fireblock Insulating Foam Sealant, $16 for 16 ounces; amazon.com).
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