---
product_id: 376690457
title: "Flex Foam-iT! III Flexible Polyurethane Foam - Trial Unit"
brand: "smooth-on"
price: "$300"
currency: NZD
in_stock: true
reviews_count: 5
category: "Smooth On"
url: https://www.desertcart.nz/products/376690457-flex-foam-it-iii-flexible-polyurethane-foam-trial-unit
store_origin: NZ
region: New Zealand
---

# 2-hour full cure time 1:2 mix ratio (Part A:B) 15x volume expansion Flex Foam-iT! III Flexible Polyurethane Foam - Trial Unit

**Brand:** smooth-on
**Price:** $300
**Availability:** ✅ In Stock

## Summary

> 🚀 Expand Your Creativity with FlexFoam-iT! III – Where Innovation Meets Flexibility

## Quick Answers

- **What is this?** Flex Foam-iT! III Flexible Polyurethane Foam - Trial Unit by smooth-on
- **How much does it cost?** $300 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.nz](https://www.desertcart.nz/products/376690457-flex-foam-it-iii-flexible-polyurethane-foam-trial-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

- • **Fast & Flexible Curing:** Solidifies in just 2 hours, delivering durable yet flexible foam for versatile projects.
- • **Precision Mixing Ratio:** Easy 1:2 volume mix ensures consistent, reliable results every time.
- • **Pro-Grade Quality Assurance:** Premium water-blown polyurethane foam trusted by professionals for special effects and industrial use.
- • **Ultra-Light Expansion Power:** Expands up to 15 times its original volume for maximum creative impact.
- • **Creative Versatility Unleashed:** Perfect for props, custom padding, industrial gaskets, and arts & crafts—your imagination’s best ally.

## Overview

FlexFoam-iT! III is a premium water-blown flexible polyurethane foam that expands 15x its original volume, curing to a solid yet flexible state in 2 hours. Mixed at a precise 1:2 ratio, this lightweight foam is ideal for special effects, theatrical props, custom padding, and industrial applications, offering professional-grade quality and versatility for creative and industrial projects.

## Description

FlexFoam-It III from Smooth-On is a premium quality water blown flexible foam that will expand 15x the original volume. Light weight and versatile, FlexFoam-IT III can be used for a variety of projects, special effects and arts & crafts, including theatrical props, custom padding, and more. Parts A and B are mixed at a ratio of 1A:2B by volume, and poured into a mold. Mixture will rise and cure quickly to a solid state. Pot life is 35 seconds and cure time is 2 hours. Stir or shake both Part A & B before use. Can be colored with SO-Strong, UVO, and Ignite colorants.

Review: La caja llegó bastante maltratada y la paquetería tardó mucho pero el material es tal cual y útil, deberían incluir instrucciones en español
Review: We have made foam toys with this kit and its fantastic. Does exactly as promised. 2 polymers combining in a chemical reaction to make a squishy toy. Be careful and adhere to the safety instructions.

## Features

- Premium Flexible Foam - High-grade water-blown liquid expanding foams for special effects, industrial, & arts & crafts projects.
- Versatile Application - Ideal pourable foam for making props, industrial gaskets, custom foam padding, etc.
- Mix Ratio of 1:2 By Volume - 2 Part Foam Kit - Cure Time of 2 hours - Cures to a solid, flexible foam.
- FlexFoam-iT! III expanding foam mix has the lowest density & expands the most in the FlexFoam-iT! Series.
- Perform a small-scale test of your project materials to determine suitability and compatibility. Refer to the technical bulletin for more information - available on our website.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00I6LYDE4 |
| Are batteries included? | No |
| Best Sellers Rank | #55,973 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #122 in Digital Calipers |
| Brand | Smooth-On |
| Colour | Clear |
| Compatible Device | Schaumstoff |
| Country of Origin | USA |
| Customer Reviews | 4.5 4.5 out of 5 stars (697) |
| Date First Available | 27 July 2016 |
| Full Cure Time | 2 Hours |
| Item Dimensions LxWxH | 20.3 x 20.3 x 15.2 Centimeters |
| Item Form | Liquid |
| Item Height | 6 Inches |
| Item Package Quantity | 1 |
| Item Volume | 473.18 Millilitres |
| Item Weight | 1 kg 130 g |
| Item Width | 8 Inches |
| Item model number | SOFF3 |
| Manufacturer | Smooth-On, Inc. |
| Material | Polyurethane |
| Model number | SOFF3 |
| Net Quantity | 1.0 Count |
| Number of Memory Sticks | 1 |
| Package Information | Bottle |
| Product Dimensions | 20.32 x 20.32 x 15.24 cm; 1.13 kg |
| Special Feature | Strong |
| Specific Uses For Product | Art |
| UPC | 751635446410 |
| Viscosity | 1,000 cps |
| Viscosity Level | Low |
| Water Resistance Level | Not Water Resistant |

## Product Details

- **Brand:** Smooth-On
- **Item Form:** Liquid
- **Material:** Polyurethane
- **Special Feature:** Strong
- **Specific Uses For Product:** Art

## Images

![Flex Foam-iT! III Flexible Polyurethane Foam - Trial Unit - Image 1](https://m.media-amazon.com/images/I/61opt1RTmIL.jpg)

## 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

### ⭐⭐⭐ Review
*by A***L on 25 March 2025*

La caja llegó bastante maltratada y la paquetería tardó mucho pero el material es tal cual y útil, deberían incluir instrucciones en español

### ⭐⭐⭐⭐⭐ Review
*by J***W on 3 January 2019*

We have made foam toys with this kit and its fantastic. Does exactly as promised. 2 polymers combining in a chemical reaction to make a squishy toy. Be careful and adhere to the safety instructions.

### ⭐⭐⭐⭐⭐ Review
*by A***O on 30 May 2021*

This product i used specifically to make "fursuit" foam feet with. Following instructions carefully makes great casts. 1 disclaimer, make sure you use it in a warm environment or the solutions become stiff and your cast will fail.

## Frequently Bought Together

- Smooth-On FlexFoam-iT!™ III Flexible Urethane Foam, Casting Foam for Props, Gaskets, & More - Pint Unit
- Smooth-On Universal™ Mold Release Spray, 14 fl. oz. Aerosol Can
- Rebound 25 - Brushable Platinum Silicone Rubber - Gallon Unit

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*Product available on Desertcart New Zealand*
*Store origin: NZ*
*Last updated: 2026-02-21*