Search  for anything...
Smooth-On

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

  • Based on 699 reviews
Condition: New
Checking for the best price...
$223.35 Why this price?
Save $33.48 was $256.83

Buy Now, Pay Later

As low as $37.23 / mo
  • – 6-month term
  • – No impact on credit
  • – Instant approval decision
  • – Secure and straightforward checkout

Ready to go? Add this product to your cart and select a plan during checkout.

Payment plans are offered through our trusted finance partners Klarna, PayTomorrow, Affirm, Afterpay, Apple Pay, and PayPal. No-credit-needed leasing options through Acima may also be available at checkout.

Learn more about financing & leasing here.

Selected Option

Free shipping on this product

30-day refund/replacement

To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

Availability: In Stock.
Fulfilled by Smooth-On, Inc.
Arrives Monday, Sep 8
Order within 11 hours and 56 minutes
Available payment plans shown during checkout

Recently Viewed

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


Compatible Material: Vinyl


Item Form: Foam,Liquid


Item Weight ‏ : ‎ 25.5 Pounds


Item model number ‏ : ‎ FlexFoamItIII


Date First Available ‏ : ‎ October 7, 2014


Manufacturer ‏ : ‎ Smooth-On, Inc.


Best Sellers Rank: #37,491 in Arts, Crafts & Sewing (See Top 100 in Arts, Crafts & Sewing) #1,341 in Craft Foam #1,377 in Sewing Pillow Forms & Foam


#1,341 in Craft Foam:


#1,377 in Sewing Pillow Forms & Foam:


Customer Reviews: 4.5 4.5 out of 5 stars 699 ratings


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Monday, Sep 8

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.

  • Klarna Financing
  • Affirm Pay in 4
  • Affirm Financing
  • Afterpay Financing
  • PayTomorrow Financing
  • Financing through Apple Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Similar Products

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
    • 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
    • Great for Squishies, but important tips
Size: Pint Unit
I bought this kit to make blank squishies for a library program. Everything worked fairly well once I got the hang of what I was doing so I thought I'd list a few valuable tips. 1) ROOM TEMPERATURE AND HUMIDITY MATTER!!! One of the molds I made was a doughnut shape and anytime the room was too cool or too muggy the foam would fall like a deflated cake. 2) Try to use it up all at once. This will definitely take some time (my kit yielded approximately 70 squishies between my doughnut and owl molds), but once Part A of the set is open you will not be able to get the cap back off if you reseal it overnight (I had to break the lid off when I reopened Part A). 3) This is NOT an eco-friendly craft. It required a ton of little plastic cups and wooden craft sticks for mixing, not to mention the paper towels from cleanup. Overall if you need to make a ton of something for kids to decorate and you have the patience to mix multiple batches then it is worth it, but I will personally not take on a similar project with this material. ... show more
Reviewed in the United States on July 3, 2019 by Ayla Y
    • 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
    • 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
    • Came fast
Size: Pint Unit
Came fast, works great and exactly as described.
Reviewed in the United States on May 5, 2024 by Miranda
    • Works well but lid gets stuck so quickly
Size: Pint Unit
My son wanted to make his own squishies. We were able to do so using this product and some flexible molds. However, even if you're super careful to wipe off the lid and top of the bottle after pouring out the contents, the lid got stuck on after our second day using this. No matter what we tried, we couldn't get it unstuck. So now we can't make any more squishies. Maybe more smaller bottles might be better or some other type of lid that doesn't get stuck on. ... show more
Reviewed in the United States on June 11, 2018 by DAP

Can't find a product?

Find it on Amazon first, then paste the link below.
Checking for best price...