- Spray foam can be used in plumbing, electrical, basements, attics
- Creates weather-tight seals to stop drafts and keep critters out
- Foam sealant expands to fill, seal, and insulate gaps up to 3 in
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Product Details
About This Product
GREAT STUFF Big Gap Filler Insulating Foam Sealant is an expanding foam sealant that fills, seals and insulates gaps up to 3 inches. This ready-to-use sealant is specially formulated to take on common areas of energy loss such as rim joists/sill plates, plumbing, HVAC, and other larger penetrations. Also great for creating larger weather-tight seals to stop drafts and keep critters out.
Highlights
- Expands to fill, seal, and insulate gaps up to 3 inches (76mm)
- Forms a long-lasting, airtight, weather-resistant seal
- Can be used in interior or exterior application and is tack free in 5-15 minutes. Trims in 1 hour. Paintable, sandable and stainable
- Foam elasticity properties allows for movement and shifting within a structure
- Cures as a cream colored, rigid foam, ease of application results from all direction dispensing
- Click here to learn more about Eco Options and Energy Efficiency
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Product Information
Specifications
Coverage Area (sq. ft.): 5 sq ft
Dimensions
Coverage Area (sq. ft.) | 5 sq ft |
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Details
Compatible Install Surface | Cement, Concrete, Existing Insulation, PVC/CPVC Pipes, Wood |
|---|---|
Cure Time (hours) | 1 |
Dry to Touch (min.) | 8 min |
Insulation Features | Paintable, Stainable |
Insulation R-Value | R3.7 |
Insulation R-Value per Inch | R3.7 |
Insulation Type | Spray Foam Insulation |
Number of Pieces | 1 |
Product Weight (lb.) | 1 lb |
Product Weight (oz.) | 12 oz |
Questions & Answers
Is it waterproof
Ok to fill gaps at bottom of Brick wall that attaches to driveway.
Hello Duffy, Great Stuff™ Insulating Foam Sealant products can be used outdoors. However, the products are very sensitive to UV light. Exposure to UV light, even indirect sunlight, will cause the foam to darken to an orange or reddish-brown color in a matter of days or weeks. Constant exposure to direct sunlight will eventually cause the foam to break down and crumble apart. If used outdoors, the foam must be painted or coated with a UV-resistant coating.
Can this be used to fill the opening where the tape pulled back on the A/C line set where it enters the house?
Hello 0007, Great Stuff™ Insulating Foam Sealant products use moisture in the air to cure. They are designed to fill small cracks up to 1 inch. Great Stuff™ Big Gap Filler can be used in gaps up to 3 inches.
Can this be used to create a faux rock well pump cover?
Hello Bigsouthernmike, I’ve noticed that many people utilize this product for a variety of purposes beyond its original design. It is intended primarily for installation around piping and ductwork in building environments. While it may be suitable for your application, please note that we have not tested it in that context. If you choose to proceed, I suggest applying it in layers, as it requires moisture from the air to cure effectively. Wishing you the best of luck with your project!
Is. This spray foam grey
Hello Michael, Great Stuff™ Gaps & Cracks Insulating Foam Sealant and Great Stuff™ Big Gap Filler Insulating Foam Sealant are both cream color. Great Stuff™ Pestblock Insulating Foam Sealant is pale grey and Great Stuff™ Window & Door Insulating Foam Sealant is yellow. Great Stuff™ Fireblock Insulating Foam Sealant is orange. Great Stuff™ Multipurpose Black Insulating Foam Sealant and Great Stuff™ Pond & Stone Insulating Foam Sealant is black. Great Stuff™ products are given different colors to help identify the specific product for its intended use.
Color of foam
Hello John, Great Stuff™ Gaps & Cracks Insulating Foam Sealant and Great Stuff™ Big Gap Filler Insulating Foam Sealant are both cream color. Great Stuff™ Pestblock Insulating Foam Sealant is pale grey and Great Stuff™ Window & Door Insulating Foam Sealant is yellow. Great Stuff™ Fireblock Insulating Foam Sealant is orange. Great Stuff™ Multipurpose Black Insulating Foam Sealant and Great Stuff™ Pond & Stone Insulating Foam Sealant is black. Great Stuff™ products are given different colors to help identify the specific product for its intended use.
What is coverage of 1 can?
Hello Mike, the theoretical yields of one-component foams is measured in lineal feet of a 3/8" - 1/2" diameter bead. The 12 oz. can of Great Stuff™ Big Gap Filer has about 250 lineal feet (a total of about 0.2-0.4 cubic feet).
Is this waterproof
Hello Louie, Great Stuff™ products are water-resistant but are not waterproof. They should not be in constant contact with water.
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Compare Key Features
Product Snapshot | |
|---|---|
Great for homeowners looking for insulation, making sealing gaps up to 3 inches easier. | Great for homeowners looking for pest control, making sealing gaps easy and mess-free. |
Insulation R-value | |
R3.7 | R3.8 |
Coverage Area | |
0 sq ft | 6 sq ft |
Curing Time | |
1 hour | 1 hour |
Closed-cell structure | |
Fire Resistance | |
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