Foam Sealant
A pressurized can of polyurethane-based insulating foam sealant used to seal gaps and cracks in HVAC ducts, walls, and building cavities.
Estimated value as of 2026 · Source: Retail spray foam sealant prices from Home Depot, True Value, and Lowe's (12 oz.…
Fun Fact
Spray foam expands as it cures, allowing a single 12 oz. canister to fill gaps up to 1 inch wide across significant areas, making it more cost-effective per square foot than many traditional sealants.
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