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12 oz. Gaps and Cracks Foam Insulating Sealant

  • Creates a weather-tight seal to minimize infestation
  • Stainable, paintable, and sandable to get the desired look
  • Foam elasticity enables moving and shifting within the structure
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Product Overview

GREAT STUFF Gaps and Cracks is a polyurethane-based insulating foam sealant that fills, air-seals and insulates small gaps (up to 1 in.) inside or out. But you probably guessed as much from the name. What you might not have guessed is how easy it is to use (thanks to the straw applicator) or how it expands to take the shape of cracks and voids form a durable, airtight and water-resistant bond that eliminates unwanted airflow and helps reduce condensation.
  • Forms a permanent weather-tight seal to minimize drafts and insect infestation and has exceptional adhesion to building materials
  • GREAT STUFF gaps and cracks can be used in interior or exterior application and is tack free in 15-minutes, trims in 30-minute to 60-minutes, it's paintable, sandable and stainable
  • Cures as a cream colored, rigid foam, ease of application results from all direction dispensing
  • One 12 oz. can equals to up to 22 tubes of caulk (equals to 7 Qt. of caulk)
  • Foam elasticity properties allows for movement and shifting within a structure
  • Click here to learn more about Eco Options and Energy Efficiency
  • Seal and Save:

    great stuff insulating foam

  • How much do you need. Let our calculator help:
    Insulation calculator button

Info & Guides

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Cover Area Per Bag (sq. ft.)
5 ft²
Coverage Area (sq. ft.)
5 ft²
Product Height (in.)
Product Width (in.)
2.63 in


Compatible Install Surface
Cement,Concrete,Existing Insulation,PVC/CPVC Pipes,Wood
Cure Time (hours)
Dry to touch (min.)
Install Temperature (F)
Insulation Features
Insulation R-Value
Insulation R-Value per Inch
Insulation Type
Spray Can
Number of Pieces
Product Weight (lb.)
1 lb
Product Weight (oz.)
12 oz

Warranty / Certifications

Warranty Information

Questions & Answers

Typical questions asked about products:

  • Is the product durable?
  • Is the product easy to use?
  • What are the dimensions of the product?

Customer Reviews

  • 4.1
    out of 14 reviews
  • 75%recommend this product
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Showing 1-10 of 14 reviews
    Good for only one application
    The overall value of this product is low. After the first application, the foam hardens in the applicator rendering it unusable. Despite what the manufacturer says, there is no practical way to clean the applicator tube and trigger.
      • Verified Purchase
      This product performs. Just like Home Depot.
      This product performs. Just like Home Depot.
      • Pro
      • Verified Purchase
      • Recommended
      Must use it all at once. Although it claims to...
      Must use it all at once. Although it claims to be good for multiple uses it seals the can once it gets dry.
      Response from GREAT STUFF & DuPontDec 28, 2020
      Great Stuff™ Insulating Foam Sealant will seal itself shut if left sitting after use. Inserting a pipe cleaner sprayed with oil lubricant into the applicator straw may prolong the life of the product up to 30 days, however, it's better to plan ahead, identify, and list all possible applications before using the can.
      • Verified Purchase
      Broke too early and easily...
      Broke too early and easily
      Response from GREAT STUFF & DuPontDec 21, 2020
      Hi, HomeDepotCustomer - Thanks for sharing your comments about Great Stuff™ Gaps & Cracks Insulating Foam Sealant. We apologize for any inconvenience you may have experienced. Please check the bottom of the can to ensure that the product is within shelf life. If it is, as with all products purchased from retail, you can return it to the point of purchase for a refund or exchange.
      • Verified Purchase
      • Verified Purchase
      It did just what I wanted it to do...
      It did just what I wanted it to do
      • Verified Purchase
      Good if you have the skill...
      Good if you have the skill
      • Verified Purchase
      Rating provided by a verified purchaser...
      Rating provided by a verified purchaser
      • Verified Purchase
      Showing 1-10 of 14 reviews