Flexible PU-Foams
Smooth-On's FlexFoam-iT!™ Series of foams are premium quality water blown flexible urethan foams that can be used for a variety of industrial, art & crafts projects. These foams are lightweight, versatile and most of them are available in easy to measure and mix ratios (A + B component). The mixture expands many times to its original volume. Vibrant colors can be achieved by adding color pigments. They can be used for padding/cushion material, gasket material, or to make props and special effects.
Technical bulletin FlexFoam-iT! series

Flex Foam-iT PU-Foams come in different densities
The same amount of liquid base components yields a larger volume when the foam is of lower density
FlexFoam-iT!™ Series Tabel
Product |
Density |
Expansion |
---|---|---|
FlexFoamiT III |
ca 48 kg/m3 |
18x |
E-60 |
ca 60 kg/m3 |
20x |
FlexFoamiT V |
ca 80 kg/m3 |
10x |
FlexFoamiT X |
ca 160 kg/m3 |
6x |
FlexFoamiT 17 |
ca 272 kg/m3 |
3,5x |
FlexFoamiT 25 |
ca 550 kg/m3 |
2,5x |
FlexFoamiT 4 |
ca 91 kg/m3 |
10x |
FlexFoamiT 6 |
ca 91 kg/m3 |
10x |
FlexFoamiT VIII |
ca 138 kg/m3 |
8x |
FlexFoam-iT!™ Series overview
FlexFoam-iT!™ III - 1A:2B by volume - 15 times Expansion (approximate)
FlexFoam-iT!™ IV Tuff Stuff - 80A:100B by weight - 10 times Expansion (approximate)
FlexFoam-iT!™ V - 1A:1B by volume - 10 times Expansion (approximate)
FlexFoam-iT!™ 6 Pillow Soft - 1A:1B by volume - 10 times Expansion (approximate)
FlexFoam-iT!™ 7 FR - 1A:1B by volume - 8 times Expansion (approximate)
FlexFoam-iT!™ VIII Pillow Soft - 1A:2B by volume - 8 times Expansion (approximate)
FlexFoam-iT!™ X - 1A:1B by volume - 6 times Expansion (approximate)
FlexFoam-iT!™ 14 - 1A:2B by volume - 4 times Expansion (approximate)
FlexFoam-iT!™ 15 Tuff Stuff - 1A:2B by volume - 4 times Expansion (approximate)
FlexFoam-iT!™ 17 - 1A:2B by volume - 3,5 times Expansion (approximate)
FlexFoam-iT!™ 23 FR - 85A:100B by weight - 2 times Expansion (approximate)
FlexFoam-iT!™ 25 - 1A:2B by weight - 2 times Expansion (approximate)
Pre-mix Parts A & B – Stir or shake both Part A & Part B thoroughly before dispensing.
FlexFoam-iT! urethane casting foams have a 2 hour demold time.