• Tall can of insulating foam sealant with attached nozzle and yellow cap for sealing large gaps in home improvement projects
1 1
In Store Only IN-STORE ONLY

Great Stuff Big Gap Filler Insulating Foam Sealant, 20 oz.

Great Stuff Big Gap Filler Insulating Foam Sealant, 20 oz.

SKU: 268429

Shop All Great stuff
Add to Favorites
$12.67
Expanding foam sealant that quickly fills large gaps with an airtight, waterproof seal.
Great Stuff Big Gap Filler Insulating Foam Sealant, 20 oz. is a high-quality expanding urethane foam designed to fill large areas quickly and permanently. It is ideal for filling holes, cracks, or gaps that require a complete airtight and waterproof seal but are too large to be filled with ordinary caulk. This foam expands to approximately three times its original volume, becomes tack-free in about 45 minutes, and is fully cured within 12 hours. Each can includes a dispensing apparatus for easy application. The product is UL classified and contains no CFCs, making it an effective and environmentally conscious solution for insulation and sealing needs.
View full details

Technical Specs Technical Specs

Overview
Great Stuff Big Gap Filler Insulating Foam Sealant, 20 oz. is a high-quality expanding urethane foam designed to fill large areas quickly and permanently. It is ideal for filling holes, cracks, or gaps that require a complete airtight and waterproof seal but are too large to be filled with ordinary caulk. This foam expands to approximately three times its original volume, becomes tack-free in about 45 minutes, and is fully cured within 12 hours. Each can includes a dispensing apparatus for easy application. The product is UL classified and contains no CFCs, making it an effective and environmentally conscious solution for insulation and sealing needs.
Other Tech Specs

Customers Also Viewed

Illustration of a hand truck tilted back with three stacked red cardboard boxes of varying sizes ready for transport.

Flexible Pickup & Delivery

Find a lower price on an exact item? We'll match it. Some exclusions apply.

Learn More
Shield outline in black containing a large red checkmark, representing safety and trust in home improvement and tools.

Authorized Dealer

We are an authorized dealer of several top brands, providing high-quality products with unmatched service.

Learn More
Two red brushstroke shapes forming a stylized heart outline against a transparent background, symbolizing care or love.

Family-Owned

We are a fourth-generation family-owned business built on community, trust, and family values.

Learn More
Illustration of a house outline with a red heart shape integrated above the Hartville Hardware Lumber name, symbolizing community commitment in home improvement.

Price Pledge

We will price-match items our customers find at local competitors for less money on in-store and online purchases.

Learn More