Great Stuff Gaps and Cracks Insulating Foam Sealant, 12 Ounce - Case

In this review of Great Stuff Gaps & Cracks Insulating Foam Sealant, the bottom line is simple: this product is best for homeowners, contractors, and DIYers who need a fast, durable way to fill and air-seal small gaps under 1 in. The single biggest reason to buy is its ability to expand and form a permanent, weather-tight seal that reduces drafts and insect entry while adhering well to common building materials. The included straw applicator makes application more precise, and the quick tack-free time means jobs move on faster.

Key Features

• Permanent weather-tight seal: Forms a durable, airtight and water-resistant bond that helps minimize drafts and reduce condensation in cavities and around penetrations.
• Exceptional adhesion: Sticks to a wide range of building materials so patched areas remain firmly in place under normal conditions.
• Interior or exterior use: Can be used both inside and outside the structure for versatile sealing tasks around windows, doors and utility penetrations.
• Fast curing: Becomes tack free in about 6 minutes and can be trimmed in roughly 30 minutes so cleanup and follow-up work are efficient.
• Elastic foam: The cured polyurethane retains elasticity to accommodate movement or shifting within a structure, reducing the chance of gaps reopening.
• Easy application: The straw applicator allows targeted application into cracks and voids under 1 in without excessive waste.

Who It's For

Great Stuff Gaps & Cracks is ideal for homeowners sealing drafts around windows, doors, baseboards and utility pipes, as well as contractors needing a quick, reliable insulation and air-seal solution for small voids. Its speed and adhesion make it useful for maintenance and retrofit tasks where a permanent, water-resistant bond is desired.

It is not intended for filling large cavities over 1 in or for structural load-bearing repairs; users needing broad cavity insulation or precise non-expanding sealants should consider other products. Also avoid using it where a paintable or joint-finish product is required without proper surface preparation.

Pros & Cons

Pros

• Effective at eliminating drafts and stopping unwanted airflow when applied correctly.
• Fast tack-free and trim times speed up multi-step repair jobs.
• Good value in a case of 12 for repeat or professional use.
• Foam elasticity helps maintain the seal through normal movement and settling.

Cons

• Some users report variable stickiness or tackiness depending on substrate and conditions, so surface prep matters.
• Not suitable for gaps larger than about 1 in or where a smooth, paint-ready finish is required without trimming and finishing.

Specifications

Product type	Polyurethane insulating foam sealant
Pack size	12 cans per case
Can volume	12 ounce per can
Maximum gap	Fills gaps less than 1 in
Tack free time	About 6 minutes
Trim time	Approximately 30 minutes
Use	Interior or exterior sealing and insulating

Our Verdict

Great Stuff Gaps & Cracks is a practical, cost-effective choice for sealing small gaps and stopping drafts, especially when multiple cans are needed. Its fast curing, strong adhesion and foam elasticity make it a good value for homeowners and professionals who need reliable air-sealing and insulation for holes under 1 in; users should prepare surfaces and trim cured foam for best results.

Frequently Asked Questions

Can this be used outdoors?
Yes. The formula is rated for interior or exterior use and forms a water-resistant bond when cured.

How soon can I trim or paint it?
It is tack free in about 6 minutes and can be trimmed in roughly 30 minutes; painting should follow manufacturer guidance after full cure and surface preparation.

Will it stop drafts permanently?
When applied correctly to gaps under 1 in and allowed to cure, it forms a permanent weather-tight seal that greatly reduces drafts and insect entry.