Urethane Resins

A wide variety of liquid plastic casting resins used for hundreds of different applications. Good for industrial, art-related and hobbyist projects, they are available as rigids or semi-rigids. These plastics are used for making detailed models & prototypes, props and industrial parts. Colors and/or fillers can be added for an infinite variety of casting effects.
Urethane Resins

Smooth-CastTM Series

Easy to use and available as either rigid or semi-rigids. You can add different colors and/or fillers for an infinite variety of mind-blowing effects.

TASKTM Performance Plastics

Developed with select applications in mind such as heat distortion temperatures, strength in ultra-thin sections, high impact or abrasion resistance or resistance to fire.


Trowelable plastic paste designed for vertical surface application.

Shell ShockTM Series

Thixotropic plastic that self thickens when mixed and can be brushed onto a variety of surfaces or into rubber molds.

Feather Lite™

Heavily filled low-density urethane casting resin. So lightweight it floats in water!

KX Flex™ Series

Fast setting two-component urethane that cure quickly to semi-rigid, highly impact resistant elastomer.

SimpactTM Series

Fast-setting elastomers which offer very high tear strength, impact resistance and wear resistance.

EZ~SprayTM StyrocoatTM

Flame Rated Sprayable Plastic Coating

EZ~Spray™ Plastic

Spray plastic specifically formulated to be mixed and sprayed via Smooth-On’s EZ~Spray™ Jr. Spray System.

SMASH! PlasticTM

Liquid plastic designed to shatter/crumble on impact “breakaway glass”.

Urethane Resin Accessories

Additives compatible with Smooth-On Urethane Resins Designed for altering and enhancing their characteristics and performance.

Not sure which product is right for your project?