---
product_id: 245571998
title: "GREAT STUFF Gaps & Cracks 20 oz Insulating Foam Sealant"
brand: "great stuff"
price: "R2137"
currency: ZAR
in_stock: true
reviews_count: 5
category: "Great Stuff"
url: https://www.desertcart.co.za/products/245571998-great-stuff-gaps-and-cracks-20-oz-insulating-foam-sealant
store_origin: ZA
region: South Africa
---

# GREAT STUFF Gaps & Cracks 20 oz Insulating Foam Sealant

**Brand:** great stuff
**Price:** R2137
**Availability:** ✅ In Stock

## Quick Answers

- **What is this?** GREAT STUFF Gaps & Cracks 20 oz Insulating Foam Sealant by great stuff
- **How much does it cost?** R2137 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.za](https://www.desertcart.co.za/products/245571998-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

## Description

GREAT STUFF Gaps & Cracks 20 oz Insulating Foam Sealant : desertcart.in: Industrial & Scientific

Review: Works great for stopping drafts and sealing areas where rodents are able to enter.
Review: This is a fantastic product that expands and once dries is just like Styrofoam and expands to fill the cracks and then can easily be broken off or cut off with a razor or whatever and is very easy to work with... ONCE CURED. Here's what you need to know though 1) WEAR GLOVES. Really! I REALLY mean it. This isn't one of those things that its some technicality. It's bad enough to where it really should have a critical warning on it. Why? Basically, unlike 99% of everything else in the world, this will NOT come off your skin with soap and water. No scrubbing will remove it. Don't believe me? Google it and read how people have removed it from their fingers. I'm literally talking about things like using a grinder. Don't use your good gloves either as they'll get ruined. Get a box of disposable gloves! 2) See #1. Yes, it's that important. 3) It CAN be messy. Its not necessarily messy by itself, but when you're trying to fill in big holes and it keeps expanding you will probably use too much and have to clean it up. While using gloves (again), you might want to use some towels to quickly clean it up or just plan on trimming it later 4) It's one time use. There's a bunch there, but its not for a one-time-experiment thing. Locate all of the places that need done and then do them all and use up the can 5) Its that ugly, trademark yellow. Why can't they come up with a white version? It'd make it unnoticeable in many scenarios.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0002YX98O |
| Are batteries included? | No |
| Best Sellers Rank | #260,491 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #118 in Adhesive Sprays (Industrial & Scientific) |
| Brand | GREAT STUFF |
| Country of Origin | USA |
| Customer Reviews | 4.5 4.5 out of 5 stars (1,790) |
| Date First Available | 6 August 2012 |
| Global Trade Identification Number | 00074985001567 |
| Item Dimensions LxWxH | 7 x 7 x 24.1 Centimeters |
| Item Form | Foam |
| Item Height | 9.5 Inches |
| Item Weight | 400 g |
| Item Width | 2.75 Inches |
| Item dimensions L x W x H | 7 x 7 x 24.1 Centimeters |
| Item model number | 157911 |
| Manufacturer | Great Stuff |
| Material | Polyurethane |
| Model number | 157911 |
| Product Dimensions | 6.99 x 6.99 x 24.13 cm; 400 g |
| Style | Compact |
| UPC | 074985001567 |
| Water Resistance Level | Water Resistant |

## Product Details

- **Brand:** GREAT STUFF
- **Item Weight:** 0.4 Kilograms
- **Item dimensions L x W x H:** 7 x 7 x 24.1 Centimeters
- **Material:** Polyurethane
- **Style:** Compact

## Images

![GREAT STUFF Gaps & Cracks 20 oz Insulating Foam Sealant - Image 1](https://m.media-amazon.com/images/I/412+r1+wozL.jpg)
![GREAT STUFF Gaps & Cracks 20 oz Insulating Foam Sealant - Image 2](https://m.media-amazon.com/images/I/41vli2if6jL.jpg)
![GREAT STUFF Gaps & Cracks 20 oz Insulating Foam Sealant - Image 3](https://m.media-amazon.com/images/I/51CMzudr8TL.jpg)
![GREAT STUFF Gaps & Cracks 20 oz Insulating Foam Sealant - Image 4](https://m.media-amazon.com/images/I/51H+pmiqt6L.jpg)
![GREAT STUFF Gaps & Cracks 20 oz Insulating Foam Sealant - Image 5](https://m.media-amazon.com/images/I/51sK2n09vAL.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

### ⭐⭐⭐⭐⭐ Review
*by B***E on 29 December 2025*

Works great for stopping drafts and sealing areas where rodents are able to enter.

### ⭐⭐⭐⭐⭐ Review
*by K***R on 11 May 2017*

This is a fantastic product that expands and once dries is just like Styrofoam and expands to fill the cracks and then can easily be broken off or cut off with a razor or whatever and is very easy to work with... ONCE CURED. Here's what you need to know though 1) WEAR GLOVES. Really! I REALLY mean it. This isn't one of those things that its some technicality. It's bad enough to where it really should have a critical warning on it. Why? Basically, unlike 99% of everything else in the world, this will NOT come off your skin with soap and water. No scrubbing will remove it. Don't believe me? Google it and read how people have removed it from their fingers. I'm literally talking about things like using a grinder. Don't use your good gloves either as they'll get ruined. Get a box of disposable gloves! 2) See #1. Yes, it's that important. 3) It CAN be messy. Its not necessarily messy by itself, but when you're trying to fill in big holes and it keeps expanding you will probably use too much and have to clean it up. While using gloves (again), you might want to use some towels to quickly clean it up or just plan on trimming it later 4) It's one time use. There's a bunch there, but its not for a one-time-experiment thing. Locate all of the places that need done and then do them all and use up the can 5) Its that ugly, trademark yellow. Why can't they come up with a white version? It'd make it unnoticeable in many scenarios.

### ⭐⭐⭐⭐⭐ Review
*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.co.za/products/245571998-great-stuff-gaps-and-cracks-20-oz-insulating-foam-sealant](https://www.desertcart.co.za/products/245571998-great-stuff-gaps-and-cracks-20-oz-insulating-foam-sealant)

---

*Product available on Desertcart South Africa*
*Store origin: ZA*
*Last updated: 2026-03-13*