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Smooth-On

FlexFoam-iT! III - Flexible Polyurethane Foam - Gallon Unit

  • Based on 723 reviews
Condition: New
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Availability: In Stock.
Fulfilled by Smooth-On, Inc.
Arrives Saturday, Aug 29
Order within 22 hours and 32 minutes
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Size: Gallon Unit


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.

Description

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. FlexFoam-iT! expanding flexible foams are easy to use and durable. They are lightweight, versatile and most are available in easy to measure mix ratios. They can be used for padding/cushion material, gasket material, or to make props and special effects. Vibrant colors can be achieved by adding color pigments.

Brand: Smooth-On


Specific Uses For Product: Art, Carpentry, Fabric, Furniture, Woodworking


Material: Polyurethane


Item Form: Foam, Liquid


Special Feature: 15 times expansion


Specific Uses For Product: Art, Carpentry, Fabric, Furniture, Woodworking


Item Form: Foam, Liquid


Other Special Features of the Product: 15 times expansion


Container Type: Can


Viscosity Level: Medium


Full Cure Time: 2 hours


Water Resistance Level: Not Water Resistant


Compatible Material: Vinyl


Item Package Quantity: 1


Volume: 277.42 fluid ounces


Brand Name: Smooth-On


Model: FlexFoamItIII


Unit Count: 1 Count


UPC: 751635446618


Manufacturer: Smooth-On, Inc.


Part Number: FlexFoamItIII


Material Type: Polyurethane


Color: White


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Saturday, Aug 29

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Top Amazon Reviews

    • Great for making squishies
Size: Pint Unit
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. ... show more
Reviewed in the United States on December 18, 2018 by D W
    • Making squishys
Size: Pint Unit
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
Reviewed in the United States on August 10, 2025 by Sheila Hazelwood
    • Please read!!!!!!
Size: Pint Unit
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. ... show more
Reviewed in the United States on October 15, 2021 by Jacob Johnson
    • Very fun
Size: Pint Unit
This is a lot of fun to use to make squishies with the kids! You have to make sure that the room is pretty warm though to make it grow to it’s full putential. Use something thick (I used a vinyl tablecloth) that can be destroyed to make this on in case of drips. You MUST use silicone molds unless you buy a separate solution to keep it from sticking to the molds and ruining your project. Molds that are the size of a baseball or softball work vest as small molds are hard to make without it puffing up too big. Very large molds are hard as the consistency of the final squishy is a lot more compact/harder than what it should be. We did a lot of experimenting. ... show more
Reviewed in the United States on November 19, 2019 by Jaime J. Weenink
    • YAY SQUISHIES!!!!!!!!
Size: Pint Unit
So my 9 yr old is all about squishies. This product was very very easy to use. However I will warn u. Def wear gloves. And don't let it get on counters, sinks etc. very hard to remove. Also I saw in other reviews to get quick release. I didn't get that and it was very hard to get out of silicone molds. Also when we did it in a plastic container or cup it didn't stick as bad and bottom came out much smoother then silicone molds. The only thing I did have trouble with was the measuring part. Didn't understand the measurements that came with it. So it was a lot of trial and error. Also when we closed containers the B container got stuck like crazy glue stuck. So it's very fun craft to do with ur kids. Just needs better instructions on how to use. I will definitely buy again ... show more
Reviewed in the United States on December 29, 2016 by Annmarie
    • Worked perfectly!
Size: Pint Unit
Nice and soft and tough. I've never used this before and it came out so well. Was like a soft mattress topper feel.
Reviewed in the United States on February 7, 2024 by Iggy VonMonty
    • The directions provided are easy to understand and comprehensive
Size: Pint Unit
We purchased this to make squishies. We have been using the silicone cupcake/donut molds. The directions provided are easy to understand and comprehensive. Temperature does seem to be a factor when using these. My house was a bit on the cold side one day when we poured this. The squishies collapsed. The directions do mention that you should be over 70F when using to avoid this. It really does matter. You don't have long to work with this. If you are making squishies, I would recommend working in small batches (1TBSP A + 2 TBSP B). Yes, it does swell to 15 times original volume, so a little bit goes a long way. ... show more
Reviewed in the United States on January 6, 2017 by Pamela Applegate-frasch
    • Amazing
Size: Pint Unit
What I liked is this product did exactly what I was hoping it would do. What I didn't like was that you have to work very fast because of how fast it sets up. It just means you have to be very organized before you mix the product. I used this product on a vintage car steering wheel horn pad that the original foam had split and separated from the horn pads structure. ... show more
Reviewed in the United States on February 4, 2024 by Doug Lindebaum

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