Smooth-Cast® Series

Smooth-Cast® Series

Low Viscosity, Easy To Use Resin

Smooth-Cast® Series

Smooth-Cast® plastics offer tremendous versatility and economy. They are 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. Perfect for casting detailed models, prototypes, props and cast effect pieces.

Technical Information & More

HIGHLIGHTS

Smooth-Cast® 300 Series

Bright White

Smooth-Cast® 300 Series

Smooth-Cast® 300 Series

Bright White

Smooth-Cast® 300, 300Q, 305, and 310 are ultra-low viscosity casting resins that offer the convenience of a 1:1 mix ratio by volume and yield castings that are bright white, tough, durable, machinable, paintable, and virtually bubble free.

One to One Mix Ratio One to One Mix Ratio
Low Viscosity Low Viscosity
No Scale Necessary No Scale Necessary

Smooth-Cast® 320 Series

Off-White

Smooth-Cast® 320 Series

Smooth-Cast® 320 Series

Off-White

Easier to color than our 300 Series using SO‑Strong®, UVO® or Ignite® colorants. Smooth-Cast® 320, 321, and 322 also readily accept fillers (such as URE‑FIL® 3, 5 and 7). Applications include reproducing small to medium size sculptures, making prototype models, special effect props, decorative jewelry, and taxidermy (bones, antlers, teeth etc.).

Low Viscosity Low Viscosity
One to One Mix Ratio One to One Mix Ratio
No Scale Necessary No Scale Necessary

Smooth-Cast® 325 Series

Colormatch™ For True Color Representation

Smooth-Cast® 325 Series

Smooth-Cast® 325 Series

Colormatch™ For True Color Representation

Developed specifically for adding color pigments and fillers to achieve a true color representation or filler effect. Small amounts of SO-Strong®, UVO® or Ignite® colorants will yield accurate, vivid colors from cured castings. Ideal for creating marble and woodgrain casting effects, or duplicating the look of real metal by adding bronze, brass or other metal powder.

Easy to Color Easy to Color
Low Viscosity Low Viscosity
No Scale Necessary No Scale Necessary

Smooth-Cast® ONYX®

Ultra-Black and High Heat Resistance

Smooth-Cast® ONYX®

Smooth-Cast® ONYX®

Ultra-Black and High Heat Resistance

Higher physical properties and higher heat resistance vs. other general purpose resins (up to 250°F/121°C if post cured). Because ONYX® is a fast curing resin and becomes hard quickly, it is also great for doing fast cold cast bronze, brass, copper, nickel/silver and other metals.

High Heat Resistance High Heat Resistance
No Scale Necessary No Scale Necessary
One to One Mix Ratio One to One Mix Ratio

Smooth-Cast® Semi-Rigid Resins

Smooth-Cast® Semi-Rigid Resins

Smooth-Cast® Semi-Rigid Resins

Smooth-Cast® 45D, 60D, 61D, 65D and 66D are low-cost urethane casting resins that cure quickly to semi-rigid plastics that offer excellent impact resistance. Smooth‑Cast® 65D has a unique gradual cure profile making it ideal for making lightweight, hollow rotational castings.

No Scale Necessary No Scale Necessary
One to One Mix Ratio One to One Mix Ratio
Impact Resistant Impact Resistant

Smooth-Cast® Tooling Resins

Smooth-Cast® Tooling Resins

Smooth-Cast® Tooling Resins

Smooth‑Cast® 380 and 385 are mineral filled casting resins that are very hard, durable, and cure with low shrinkage. Smooth‑Cast® 380 features ultra high density and very low cost. Smooth‑Cast® 385 has high compressive and flexural strength. Ideal for making industrial parts, foundry patterns, vacuum forming molds, and some ceramic applications.

Low Shrinkage Low Shrinkage
Gram Scale Required for 385 Gram Scale Required for 385

Technical and Buying Information

Select a Product Below Pot Life Cure Time Color Hardness
 Smooth-Cast® 300 3 mins 10 mins White 70 D
 Smooth-Cast® 300Q 30 secs 5 mins White 70 D
 Smooth-Cast® 305 7 mins 30 mins White 70 D
 Smooth-Cast® 310 20 mins 4 hrs White 70 D
 Smooth-Cast® 320 3 mins 10 mins Off White 70 D
 Smooth-Cast® 321 9 mins 30 mins Off White 70 D
 Smooth-Cast® 322 20 mins 4 hrs Off White 70 D
 Smooth-Cast® 325 2.5 mins 10 mins Clear Amber 72 D
 Smooth-Cast® 326 9 mins 60 mins Clear Amber 72 D
 Smooth-Cast® 327 20 mins 4 hrs Clear Amber 72 D
 Smooth-Cast® 45D 5 mins 30 mins Translucent White 45 D
 Smooth-Cast® 60D 5 mins 30 mins Translucent White 60 D
 Smooth-Cast® 61D 7 mins 60 mins Translucent White 61 D
 Smooth-Cast® 65D 2.5 mins 15 mins White 65 D
 Smooth-Cast® 66D 7 mins 60 mins Grey 66 D
 Smooth-Cast ONYX® FAST 2.5 mins 15 mins Black 80 D
 Smooth-Cast ONYX® SLOW 5 mins 90 mins Black 80 D
 Smooth-Cast® 380 6 mins 60 mins Tan 82 D
 Smooth-Cast® 385 20 mins 2 hrs Beige 85 D

VIDEOS and GALLERIES

Step-by-Step How-To Articles

video

Metal Cold Casting With Smooth-Cast® 325 Resin

Metal Cold Casting With Smooth-Cast® 325 Resin

The metal cold-casting process is faster and much less expensive compared with foundry casting of molten metal.

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video

Martha Stewart Makes Resin Flower Barrettes

Martha Stewart Makes Resin Flower Barrettes

Martha and Morgan Levine use a dipping technique to create hard barrettes and brooches using crepe paper flowers.

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video

Create Your Own Cast Live Rock Using Smooth Cast® 321

Create Your Own Cast Live Rock Using Smooth Cast® 321

Making your own live rock offers an infinite variety of design / color possibilities.

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video

How To Make a Silicone Mold of a Fish

How To Make a Silicone Mold of a Fish

This moldmaking video shows the process of molding an actual trout for taxidermy or propmaking purposes.

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video

Tested Presents ‑ How To Slush Cast a Prop Helmet

Tested Presents ‑ How To Slush Cast a Prop Helmet

Frank Ippolito shows you how to create a hollow resin cast of a helmet

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How To Mold and Cast a Resin Sculpture - Ghost Rider

How To Mold and Cast a Resin Sculpture - Ghost Rider

Learn how to mold and cast a backlit bust of the infamous Marvel character, Ghost Rider.

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video

Casting Smooth-Cast 300 Liquid Plastic Casting Resin Into a Urethane Mold

Casting Smooth-Cast 300 Liquid Plastic Casting Resin Into a Urethane Mold

Preparing a urethane mold for casting, measuring and mixing liquid plastic.

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video

Casting Quickies - Smooth-Cast® 325 - ColorMatch Urethane Resin

Casting Quickies - Smooth-Cast® 325 - ColorMatch Urethane Resin

In this resin casting tutorial video, we demonstrate how to mix and pour Smooth Cast 325 liquid plastic resin.

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Casting Custom Scenery For a Model Railroad

Casting Custom Scenery For a Model Railroad

Mold making and casting gives model railroaders options for creating custom scenic display pieces.

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video

How To Rotocast Resin for Lightweight Displays

How To Rotocast Resin for Lightweight Displays

Smooth-Cast® 65D is used in a rotocasting machine to create full-sized display heads which only weigh 2 lbs. (0.9 kgs) each.

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Turning an Antique Chair from Trash Into Treasure

Turning an Antique Chair from Trash Into Treasure

An antique chair is easily repaired using Smooth-Cast® 385 mineral filled casting resin and Universal® Release Agent.

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video

Creating a Marble Effect Using Urethane Plastic

Creating a Marble Effect Using Urethane Plastic

Creating a realistic cast marble effect is possible with Smooth-Cast® 325 liquid plastic.

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video

Casting Quickies - Smooth-Cast® 300 White Liquid Plastic

Casting Quickies - Smooth-Cast® 300 White Liquid Plastic

The Smooth-Cast® 300 Series of liquid plastics are ultra-low viscosity casting resins that yield castings that are bright white and virtually bubble free.

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How To Mold a Captain America Cosplay Helmet Using Rebound 25

How To Mold a Captain America Cosplay Helmet Using Rebound 25

Justin Jotso of Jester Productions and FX's replica Captain America helmet.

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What Have Other People Done With These Products?

Making A One Piece Cut Block Mold

Making A One Piece Cut Block Mold

A one piece cut block mold is a popular mold making method that has some definite advantages.

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Bad Dog Creations Speeds To The Rescue Of 'Gotham's Finest

Bad Dog Creations Speeds To The Rescue Of 'Gotham's Finest

Working on a film-set is one of the most time-intensive occupations on the planet.

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Ultra Miniature Aircraft Accessories By Modern Hobbies LLC

Ultra Miniature Aircraft Accessories By Modern Hobbies LLC

Modern Hobbies LLC® is THE place for "Small Scale" jet modelers looking for rare, hard to find items to outfit their modern military aircraft.

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Puppets Come To Life At Waken Productions

Puppets Come To Life At Waken Productions

Waken Productions, Inc. was spawned from a successful machine design company.

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Captain America Tribute Helmet Made from Smooth-Cast® 45D

Captain America Tribute Helmet Made from Smooth-Cast® 45D

When Jonathan Hunt was searching out materials to create 'Captain America' style helmets for his clients, he was looking for very particular properties.

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The Imaginative Works of Andrea Leanza

The Imaginative Works of Andrea Leanza

Andrea Leanza is a special effects artist located in Treviso, Italy.

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Labor of Love for the Tall Masts

Labor of Love for the Tall Masts

Ken Gardiner started making models 39 years ago as a hobby based on what he learned from his father. About eight years later, Ken decided it might be worthwhile making a living out of it.

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Miniature Realism Created By Robert

Miniature Realism Created By Robert

Robert's custom cast resin action figure accessories are well know for their ultimate detail.

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Casting and Finishing Smooth-Cast® ONYX® Deep Black Resin

Casting and Finishing Smooth-Cast® ONYX® Deep Black Resin

Smooth-Cast ONYX® is a mercury-free urethane resin that cures quickly...

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Football Tee Made Indestructible with 60D

Football Tee Made Indestructible with 60D

'DDD' came up with a design that had a lower center of gravity

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Themed Rock Display at New York Auto Show

Themed Rock Display at New York Auto Show

Two scenic companies collaborated on a project to launch the new Jeep Liberty

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A Unique Application for Smooth-Cast® 326 Liquid Plastic

A Unique Application for Smooth-Cast® 326 Liquid Plastic

Rapid Technique LLC of England recently solved a daunting problem by using Smooth-Cast® 326 liquid plastic as a coating for their 3D prototypes.

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Reaching for New Heights with Smooth-Cast® 320 Liquid Plastic

Reaching for New Heights with Smooth-Cast® 320 Liquid Plastic

Smooth-On has been a supplier to manufacturers of sports and recreational equipment for years. An example of such products involves Indoor Rock Climbing Gyms.

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Puppet legacy lives on with Smooth-On Products

Puppet legacy lives on with Smooth-On Products

In 1938 a 15 year old boy created and staged his marionette version of Puss in Boots for children at the Nashville Public Library.

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Daft Punk Helmet by Volpin Props

Daft Punk Helmet by Volpin Props

This helmet was the fruit of 17 months of work.

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