Can i use with plastic? or do i need a release agent?

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.

Would this work well for filling a plaster body cast intended to make a dress form for sewing?

I thinking would. It is pretty "squishy " so if that's okay with you then I think it would work well.

Hi, do you also have smooth on flex foamV or 6?

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.

What is the Shore hardness of the resultant foam?

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.

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Smooth-On Flex Foam-It! 3 Pourable Flexible Foam Trial Unit by Smooth-On, Inc.

Smooth-On Flex Foam-It! 3 Pourable Flexible Foam Trial Unit by Smooth-On, Inc.

Product ID: 257869464

Details

Brand
Smooth-On
Item form
Liquid
Material
Polyurethane
Special features
Fast Drying
Specific uses for product
Craft

⏳2 hr full cure - quick turnaround

⚡35 sec pot life - ultra fast mix

📈Expands 15x volume - max yield

€ 139.75

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Description

🚀 Expand your creative limits with FlexFoam-It III!

MASSIVE 15 X EXPANSION - Stretch your creativity and materials further with high-volume foam growth.
LIGHTWEIGHT VERSATILE - Ideal for custom padding, theatrical props, and arts & crafts without the bulk.
RAPID 35 SECOND POT LIFE - Mix and pour before it’s gone—perfect for fast-paced projects.
RELIABLE 2 HOUR CURE TIME - Get solid, durable results fast—no long waits, no downtime.
VIBRANT COLOR CUSTOMIZATION - Use SO-Strong, UVO, and Ignite colorants to make your projects pop.

Smooth-On FlexFoam-It III is a premium water-blown polyurethane foam that expands 15 times its original volume. With a rapid 35-second pot life and a full cure in just 2 hours, this lightweight, low-viscosity foam is perfect for fast, versatile applications like custom padding, theatrical props, and crafts. Compatible with multiple colorants, it offers professional-grade flexibility and vibrant finishes for your next project.

Specifications

Asin	B00I6LYDE4
Best Sellers Rank	#123,705 in Tools & Home Improvement (See Top 100 in Tools & Home Improvement) #36 in Expanding Foams
Brand Name	Smooth-On
Color	Clear
Compatible Material	Foam
Container Type	Pint
Customer Reviews	4.5 4.5 out of 5 stars (703) 4.5 out of 5 stars
Full Cure Time	2 Hours
Item Form	Liquid
Item Package Quantity	1
Item Weight	2.49 Pounds
Manufacturer	SMOOTH-ON
Material Type	Polyurethane
Model	SOFF3
Number Of Pieces	2
Other Special Features Of The Product	Fast Drying
Part Number	44644
Specific Uses For Product	Craft
Upc	751635446410
Viscosity Level	Low
Volume	473.18 Milliliters
Water Resistance Level	Not Water Resistant

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Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

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€ 139.75

Duties & taxes included

In stock

Sold byAmazon ItalyDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Italy.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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