--- product_id: 81431292 title: "GREAT STUFF Gaps & Cracks 20 oz Insulating Foam Sealant" brand: "great stuff" price: "$256.57" currency: USD in_stock: true reviews_count: 5 category: "Great Stuff" url: https://www.desertcart.ec/products/81431292-great-stuff-gaps-and-cracks-20-oz-insulating-foam-sealant store_origin: EC region: Ecuador --- # Waterproof & weather-resistant Seals drafts & gaps airtight 20 oz high-expansion foam GREAT STUFF Gaps & Cracks 20 oz Insulating Foam Sealant **Brand:** great stuff **Price:** $256.57 **Availability:** ✅ In Stock ## Summary > 🛠️ Seal the deal, block the chill, and upgrade your space effortlessly! ## Quick Answers - **What is this?** GREAT STUFF Gaps & Cracks 20 oz Insulating Foam Sealant by great stuff - **How much does it cost?** $256.57 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.ec](https://www.desertcart.ec/products/81431292-great-stuff-gaps-and-cracks-20-oz-insulating-foam-sealant) ## Best For - great stuff enthusiasts ## Why This Product - Trusted great stuff brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Compact Yet Mighty:** 20 oz can delivers long-lasting, high-performance foam - • **Eco-Smart Efficiency:** Reduces energy loss, helping you save on heating & cooling bills - • **Trusted by DIY Experts:** ASTM C-920 certified for reliable sealing and durability - • **Weatherproof Your Space:** Waterproof formula protects against moisture and drafts - • **Seal Every Crack Like a Pro:** Expands to fill gaps up to 1 inch for airtight insulation ## Overview GREAT STUFF Gaps & Cracks 20 oz Insulating Foam Sealant is a high-expansion, waterproof foam designed to seal gaps and cracks up to 1 inch wide. Compact and easy to use, it provides durable insulation that reduces drafts, moisture intrusion, and energy loss. Certified to ASTM C-920 standards, this foam is a trusted choice for professional-grade weatherization and home improvement projects. ## Description GREAT STUFF Gaps & Cracks 20 oz Insulating Foam Sealant Review: Great product for the price - Works great for stopping drafts and sealing areas where rodents are able to enter. Review: Just a couple things to keep in mind - This is my go to for insulation and gap filling. Once cured, it's perfect. Just two things to keep in mind: 1. Don't get it on anything you want untouched by foam. It's tenacious and sticky, and getting it off your skin is a chore. Wear gloves. 2. Once you start using a can of it, use as much as possible, because using it again after the foam dries in the tube is pretty much impossible. ## Features - Causes skin irritation. - Contains gas under pressure; may explode if heated. - Flammable aerosol. - Harmful if inhaled. - May cause allergy or asthma symptoms or breathing difficulties if inhaled. - May cause an allergic skin reaction. - May cause damage to organs through prolonged or repeated exposure. - May cause harm to breast-fed children. - May cause respiratory irritation. - GREAT STUFF Gaps & Cracks 20 oz Insulating Foam Sealant - Product type: SEALANT - Brand: GREAT STUFF ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0002YX98O | | Best Sellers Rank | 794,104 in DIY & Tools ( See Top 100 in DIY & Tools ) 6,382 in Sealers | | Brand | GREAT STUFF | | Colour | Multicolor | | Compatible Material | Glass | | Customer Reviews | 4.5 out of 5 stars 1,801 Reviews | | Global Trade Identification Number | 00074985001567 | | Included Components | Expanding foam sealant | | Item Dimensions | 7 x 7 x 24.1 centimetres | | Item Form | Foam | | Item Weight | 20 Ounces | | Item dimensions L x W x H | 7 x 7 x 24.1 centimetres | | Item weight | 20 Ounces | | Manufacturer | Great Stuff | | Manufacturer Part Number | 157911 | | Material | foam | | Model Number | 157911 | | Number of Items | 1 | | Style | Compact | | Style Name | Compact | | Supported Standards | ASTM C-920 | | Surface Recommendation | [At least some of: Wall, Sink, Tile, Floor] | | UPC | 074985001567 | | Unit Count | 591.47 millilitre | | Water Resistance Level | Waterproof | | Water resistance level | Waterproof | ## Product Details - **Brand:** GREAT STUFF - **Item dimensions L x W x H:** 7 x 7 x 24.1 centimetres - **Item weight:** 0.4 Kilograms - **Material:** foam - **Style:** Compact ## Images ![GREAT STUFF Gaps & Cracks 20 oz Insulating Foam Sealant - Image 1](https://m.media-amazon.com/images/I/711Ut2xjZ+L.jpg) ![GREAT STUFF Gaps & Cracks 20 oz Insulating Foam Sealant - Image 2](https://m.media-amazon.com/images/I/918OkHQqBEL.jpg) ![GREAT STUFF Gaps & Cracks 20 oz Insulating Foam Sealant - Image 3](https://m.media-amazon.com/images/I/81m3D2T2VCL.jpg) ![GREAT STUFF Gaps & Cracks 20 oz Insulating Foam Sealant - Image 4](https://m.media-amazon.com/images/I/A1fv596Kt4L.jpg) ![GREAT STUFF Gaps & Cracks 20 oz Insulating Foam Sealant - Image 5](https://m.media-amazon.com/images/I/91P98at6izL.jpg) ## Questions & Answers **Q: What is the R-rating on this?** A: Hi Dave! The initial R-value is 4.3 per inch and the aged R-value is 3.7. Good luck with your project! **Q: Is closed or open cell foam?** A: Hi Meggi, This is a closed cell foam. **Q: can this be used to fill holes between dry wall and hardwood, then covered with molding? Will the foam crack if a nail goes into it?** A: This is the perfect place to use this foam! I did this in my own home recently when we were installing new baseboard. You can apply the foam in the gap, and like others said be careful about overfilling because it does expand quite a lot. I also highly recommend buying our Cleaner / Amazon # B0002YWRG4 because you can spray this on a paper towel and clean up foam when it's still wet. It's a useful product for any project using GREAT STUFF foams. Don't worry if it puffs out too much, you can cut, sand, caulk or paint this foam once fully cured/dry. The foam will not crack if you nail through it but it also is not structural so you'll need to make sure you're nailing the molding into the wall. Good luck with your project! **Q: is it safe around a hot baseboard heater pipe coming into the room through the floor?? thats where mice get into the rooms from under the floor** A: I looked at the can and it doesn't really say. The stuff before it cures is full of flammable gas but it doesn't say anything about keeping the cured material from heat. Now, that being said, (I'm putting on my professional chemist hat) Great Stuff is a polyurethane. And polyurethanes are flammable. So, I would be concerned if the area got very hot, say over 150F. Hope this helps. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Great product for the price *by B***E on 29 December 2025* Works great for stopping drafts and sealing areas where rodents are able to enter. ### ⭐⭐⭐⭐ Just a couple things to keep in mind *by J***T on 27 September 2023* This is my go to for insulation and gap filling. Once cured, it's perfect. Just two things to keep in mind: 1. Don't get it on anything you want untouched by foam. It's tenacious and sticky, and getting it off your skin is a chore. Wear gloves. 2. Once you start using a can of it, use as much as possible, because using it again after the foam dries in the tube is pretty much impossible. ### ⭐⭐⭐⭐⭐ Got a gap fill your crack *by J***H on 4 December 2025* The only thing I don't like about this stuff is if you just need a little bit and then you store it away you can't use it once that stuff hardens up in the spray nozzle so what I did this time was I made sure to clean out the excess material out of the nozzle in the can itself as well as the straw with an air gun hopefully that preserves it for the next time I need it since this is a massive can ## Frequently Bought Together - Great Stuff 157911 Insulating Foam Sealant, 20 Ounce, Ivory - Steel Wool Mice Control, 2 Pack 3" x10 Ft Hole Filler, Gap Blocker, Barrier, Protect Against Animals in Holes Holes, Siding, Pipeline, Vents for Garden, House, Garage - Great Stuff 99108824 Smart Dispenser Gaps & Cracks, Cream, 12 Ounce --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.ec/products/81431292-great-stuff-gaps-and-cracks-20-oz-insulating-foam-sealant](https://www.desertcart.ec/products/81431292-great-stuff-gaps-and-cracks-20-oz-insulating-foam-sealant) --- *Product available on Desertcart Ecuador* *Store origin: EC* *Last updated: 2026-08-11*