--- product_id: 448590754 title: "FlexFoam-iT! III - Flexible Polyurethane Foam - Gallon Unit" brand: "smooth-on" price: "£247.00" currency: GBP in_stock: true reviews_count: 13 category: "Smooth On" url: https://www.desertcart.co.uk/products/448590754-flexfoam-it-iii-flexible-polyurethane-foam-gallon-unit store_origin: GB region: United Kingdom --- # 2-hour full cure time 15x volume expansion 1:2 precise mix ratio FlexFoam-iT! III - Flexible Polyurethane Foam - Gallon Unit **Brand:** smooth-on **Price:** £247.00 **Availability:** ✅ In Stock ## Summary > 🛠️ Flex your creativity with foam that expands your possibilities! ## Quick Answers - **What is this?** FlexFoam-iT! III - Flexible Polyurethane Foam - Gallon Unit by smooth-on - **How much does it cost?** £247.00 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.uk](https://www.desertcart.co.uk/products/448590754-flexfoam-it-iii-flexible-polyurethane-foam-gallon-unit) ## Best For - smooth-on enthusiasts ## Why This Product - Trusted smooth-on brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Rapid 2-Hour Cure:** Get your projects ready fast without the wait. - • **Massive 15x Expansion:** Transform a small mix into a large, flexible foam masterpiece. - • **Versatile Creative Use:** Ideal for propmaking, special effects, squishies, and custom crafts. - • **Precision 1:2 Mix Ratio:** Achieve perfect consistency every time with easy volume measuring. - • **Pro-Level Safety & Handling:** Designed for professionals with clear safety guidelines and ventilation needs. ## Overview FlexFoam-iT! III is a professional-grade flexible polyurethane foam that cures to a soft white foam in just 2 hours. With a remarkable 15 times expansion and a simple 1:2 volume mix ratio, it’s perfect for propmaking, special effects, and custom squishy creations. Trusted by thousands of crafters and professionals, this gallon unit delivers consistent, high-quality results when used with proper safety precautions. ## Description FlexFoam-iT! III - Flexible Polyurethane Foam - Gallon Unit: desertcart.com: Industrial & Scientific Review: Great for making squishies - Buying squishies and repainting them or buying unpainted ones and painting them yourself is cool, but making your own is even better. I use silicone baking molds, candy molds and ice molds to cast mine and have had great results. This starter package will make a LOT of squishies. It is easy and the company's web site has great videos explaining everything. BE SURE to pick up lots of paint stirring sticks at some place that sells house paint because you will need them. This is great stuff an easy to use. Just know that once you mix the two parts (A & B) together you have have 30 seconds of so to get it in the molds. This is very different from acrylic casting which has a much longer pot life. Review: Making squishys - Works perfect for squishys my daughter used molds and made them it was alot of fun I help her i recommend older help cuz it can get messy ## Features - Cures to a soft white foam in 2 hours - Suitable for propmaking and special effects - 15 times expansion - 1:2 by volume mix ratio - WARNING: Keep Out of Reach of Children. Do not get into eyes or on skin. Do not take internally. Do not breathe fumes. Use only with adequate ventilation. Wear vinyl or nitrile gloves and eye protection when handling this product. Review the technical bulletin prior to use for safe handling instruction. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0B2X4FVPT | | Best Sellers Rank | #37,534 in Arts, Crafts & Sewing ( See Top 100 in Arts, Crafts & Sewing ) #1,585 in Craft Foam #2,162 in Sewing Pillow Forms & Foam | | Brand | Smooth-On | | Brand Name | Smooth-On | | Color | White | | Compatible Material | Vinyl | | Container Type | Can | | Customer Reviews | 4.6 out of 5 stars 722 Reviews | | Full Cure Time | 2 Hours | | Item Form | Foam,Liquid | | Item Package Quantity | 1 | | Manufacturer | Smooth-On, Inc. | | Material | Polyurethane | | Material Type | Polyurethane | | Model | FlexFoamItIII | | Other Special Features of the Product | 15 times expansion | | Part Number | FlexFoamItIII | | Special Feature | 15 times expansion | | Specific Uses For Product | Art, Carpentry, Fabric, Furniture, Woodworking | | UPC | 751635446618 | | Unit Count | 1.0 Count | | Viscosity Level | Medium | | Volume | 277.42 Fluid Ounces | | Water Resistance Level | Not Water Resistant | ## Product Details - **Brand:** Smooth-On - **Item Form:** Foam,Liquid - **Material:** Polyurethane - **Special Feature:** 15 times expansion - **Specific Uses For Product:** Art, Carpentry, Fabric, Furniture, Woodworking ## Images ![FlexFoam-iT! III - Flexible Polyurethane Foam - Gallon Unit - Image 1](https://m.media-amazon.com/images/I/41aHADK936L.jpg) ## Available Options This product comes in different **Size** options. ## Questions & Answers **Q: Can i use with plastic? or do i need a release agent?** A: Urethane foams are adhesive and will stick / bond to many surfaces. We recommend Ease Release™ 2831 to release urethane foam from most surfaces. If the release application is particularly difficult (example; releasing urethane foam from urethane rubber), we recommend an application of Universal Mold Release™ followed by an application of Ease Release™ 2831. WARNING; Do not use Universal Mold Release by itself, or any other silicone based release agents. This will collapse the foam. You MUST perform a small scale test to determine if the release agent you use will work properly with the plastic you are casting against. **Q: Would this work well for filling a plaster body cast intended to make a dress form for sewing?** A: I thinking would. It is pretty "squishy " so if that's okay with you then I think it would work well. **Q: Hi, do you also have smooth on flex foamV or 6?** A: I am not Amazon and I have not worked with 6 (Pillow soft) but I have a sample of it. The Smooth-On web site says they make sample kits for both products and they are both similar to 3 in that they are measured by volume. The big difference is that they expand less. **Q: What is the Shore hardness of the resultant foam?** A: I could not find a Shore Hardness for the Foam (and yes, I know what I was looking for) but since it is their most expansive foam I imagine the number to be quite low. I am not even Shore Hardness applies to foams. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Great for making squishies *by D***W on December 18, 2018* Buying squishies and repainting them or buying unpainted ones and painting them yourself is cool, but making your own is even better. I use silicone baking molds, candy molds and ice molds to cast mine and have had great results. This starter package will make a LOT of squishies. It is easy and the company's web site has great videos explaining everything. BE SURE to pick up lots of paint stirring sticks at some place that sells house paint because you will need them. This is great stuff an easy to use. Just know that once you mix the two parts (A & B) together you have have 30 seconds of so to get it in the molds. This is very different from acrylic casting which has a much longer pot life. ### ⭐⭐⭐⭐⭐ Making squishys *by S***D on August 10, 2025* Works perfect for squishys my daughter used molds and made them it was alot of fun I help her i recommend older help cuz it can get messy ### ⭐⭐⭐⭐⭐ Please read!!!!!! *by J***N on October 15, 2021* This is not for the faint of heart. It is toxic and very very unforgiving. Please watch YouTube videos and read their site for help. It’s insanely sticky, so use silicon forms where you’re pouring. Measure!!! Use a scale, it makes it so much easier. 1A:2B or .575 difference. 10 grams A = 17.3g B. This is insanely important. Very unforgiving. Yellow bottle is the hardener…. Too much yellow it’s too hard or doesn’t expand. Too much blue bottle it doesn’t stay expanded and looks weird. Mix until 35 seconds and your shoulder is on fire. When you combine the chemicals after measuring exactly, mix immediately and use a timer. Mix until your shoulder burns. Really really really mix. Minimum 35 seconds, then pour. Lastly, it doesn’t like cold. Has to be 72+ or it doesn’t fully expand. This is all listed on the website and 100% accurate. Measure - mix - warm - remove after 25 min. It’s a great product and has a lot of uses if you can do the above. ## Frequently Bought Together - FlexFoam-iT! III - Flexible Polyurethane Foam - Gallon Unit - Rebound 25 - Brushable Platinum Silicone Rubber - Gallon Unit - THI-VEX - Thixotropic Agent for Thickening Smooth-On Silicone Rubbers - 1 Ounce Bottle --- ## 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.uk/products/448590754-flexfoam-it-iii-flexible-polyurethane-foam-gallon-unit](https://www.desertcart.co.uk/products/448590754-flexfoam-it-iii-flexible-polyurethane-foam-gallon-unit) --- *Product available on Desertcart United Kingdom* *Store origin: GB* *Last updated: 2026-07-12*