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Smooth-Cast 300 - Bright White, Ultra Low Viscosity Liquid Plastic - Pint Unit

4.7 4.7 out of 5 stars 1,173 ratings

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Pint Unit

Purchase options and add-ons

Material Plastic
Item Dimensions LxWxH 7.4 x 6 x 3.1 inches
Brand Smooth-On
Compatible Material Glass
Item Weight 2 Pounds

About this item

  • Ultra-low viscosity casting resin with bright white color
  • Vacuum degassing is not necessary to yield castings that are virtually bubble free.
  • Pot Life: 3 minutes; Cure Time: 10 minutes
  • Shore 70D
  • Mix Ratio: 1A: 1B by Volume

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Smooth-Cast 300 - Bright White, Ultra Low Viscosity Liquid Plastic - Pint Unit


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Product Description

Smooth Cast 300 is a liquid plastic ,ultra-low viscosity casting resin that yields castings that are bright white and virtually bubble-free. Vacuum degassing is not necessary. It offers the convenience of a one to one mix ratio (by volume). 3 minute pot life: 10 minute demold time: Mixed viscosity 80 cps: 70D shore hardness Fully cured castings are tough, durable, machinable and paintable. Read MSDS before use - Adult Supervision Required. Keep Out of the Reach of Children - for more information visit www.smooth-on.com

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From the manufacturer

Smooth-On
smooth-on

Smooth-On

Since 1895

Established in 1895, Smooth-On, Inc. is a leading manufacturer of silicone rubbers, polyurethane rubbers and plastics, rigid and flexible urethane foams, epoxies, polysulfide rubbers, adhesives, coatings, release agents and other material technologies.

Mind Blowing Materials for a World of Applications

You may never have heard of us, but you've seen our products at work. If you've ever been to the movies, admired a piece of sculpture, marveled at detailed architectural ornamentation or used a telephone; then you've encountered the handiwork of people who use Smooth-On rubbers, plastics, foams and other products to turn their ideas into 3-dimensional reality.

Being Successful Using Rubbers, Plastics and Foams

Smooth-On’s website has a world of information that you can access to learn best practices when using these materials. We have over 200 videos covering different topics that are easy to follow. Our FAQ library has answers to common questions associated with mold making, casting, and more. What are you waiting for? Make it now!

Smooth-On Products Include:

  • Silicone Rubber (pourable, brushable and putty)
  • Urethane Rubber
  • Urethane Resin
  • Epoxy Resin (casting, laminating and putty)
  • Lifecasting Materials (skin safe alginate and silicone)
  • Coatings (epoxy and urethane)
  • Accessories (colorants, real metal powders, pearlescent effect powders, glow in the dark powders)
  • Sealing & Release Agents

Smooth-On Products Have Endless Applications!

Home Crafts & Hobbies

Cosplay

Propmaking & Special Effects

Model Making

Home Crafts & Hobbies

Smooth-On rubbers, plastics and foams are ideal for a variety of home hobbies and arts & crafts projects. Easy to use OOMOO silicone mold rubber is perfect for the hobbyist and can be used to reproduce detail of any small or simple model.

Cosplay

Smooth-On liquid rubbers, plastics, foams, coatings and other materials are perfect for cosplay costuming. Make your own long lasting helmets, armor, props, masks, replicas and more.

Propmaking & Special Effects

Smooth-On rubbers, plastics, foams and other materials have been used for years to bring movies, TV and stage special effects to life.

Model Making

Model makers the world over know that Smooth-On silicone rubbers and liquid plastics as the perfect combination to reproduce their creations and drive production.

Examples of Smooth-on FX Makeup

Candle Making

Sculpture & Art Casting

Architectural Restoration

Makeup FX

Smooth-On's wide variety of platinum cure, skin-safe silicone rubbers are used to create realistic skin effects. Ecoflex and Dragon Skin super soft silicones have become the industry standard for creating silicone masks and more.

Candle Making

Smooth-On urethane and silicone mold rubber is used to make custom molds for casting wax. These materials are used by both the largest international candle making conglomerates and home hobbyists that enjoy making their own candles for family and friends.

Sculpture & Art Casting

Smooth-On urethane, silicone and polysulfide rubbers are used by thousands of sculptors and foundries for casting wax, resins, plaster, concrete and other sculpture materials to make accurate reproductions of original sculpture.

Architectural Restoration

Smooth-On products have been used around the world for over 60 years to restore old or create new architectural elements. Smooth-On mold rubbers are easy to use and offer maximum versatility for any restoration project.

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Customer reviews

4.7 out of 5 stars
4.7 out of 5
1,173 global ratings

Customers say

Customers like the quality, ease of use, appearance, durability and cure of the art supplies. They mention that it works perfectly for slush casting, is very beginner friendly and that it creates a nice, waterproof bond. They are also happy with the detail, and color. However, some customers differ on bubbles.

AI-generated from the text of customer reviews

84 customers mention81 positive3 negative

Customers are satisfied with the quality of the product. They say it works perfectly for slush casting, and produces consistent quality. It is a reliable product and works perfectly fast.

"...Consistent quality casts that hold up to the test of time...." Read more

"...It worked perfectly. The product created a nice, waterproof bond. Paint applied easily and, no leaks!..." Read more

"It works perfectly fast and sets real fast so you have to work real fast" Read more

"Works great for many taxidermy projects in my business" Read more

69 customers mention61 positive8 negative

Customers generally like the ease of use of the resin. They say it's a very beginner friendly resin, ideal for casting items and making figures/toys. It's not fussy, and is hard, solid, and machinable. Customers advise working quickly, as the resin sets quickly.

"...Excellent detail, de-bubbles itself, hard but enough give to not be overly crisp and fragile. Surprisingly durable." Read more

"...After some research, I found this product.It's easy to use, just follow the simple instructions on the containers...." Read more

"...It is strong and for me easy to use. Of course I mostly use injecting into molds (Larger hypodermic syringes') but one can pore it as well...." Read more

"A very beginner friendly resin, ideal for casting items and making figures/toys. The final product is very strong and durable...." Read more

41 customers mention38 positive3 negative

Customers are satisfied with the appearance of the product. They say it is amazing, it works perfectly, and it creates a nice, waterproof bond. Some say that the product is easy to learn how to use and makes great eyes for puppets. Overall, customers are happy with the product's appearance and recommend it to others.

"...It worked perfectly. The product created a nice, waterproof bond. Paint applied easily and, no leaks!..." Read more

"Great stuff but stop raising the price, last year in 2021 this only cost $146. Now it’s $186" Read more

"I’ve been using this for casting detailed fishing lures they turn out great even when adding microspheres there’s been zero bubbles In the final..." Read more

"...And boy am I glad I did ! It's amazing ! I used it in all kinds of molds and everything comes out perfect ! It cures very fast, too !..." Read more

32 customers mention25 positive7 negative

Customers like the durability of the product. They mention it's a great product, very reliable, and does cure extremely solid.

"...de-bubbles itself, hard but enough give to not be overly crisp and fragile. Surprisingly durable." Read more

"...It is strong and for me easy to use. Of course I mostly use injecting into molds (Larger hypodermic syringes') but one can pore it as well...." Read more

"...The final product is very strong and durable. I like how it cures very fast but that also means there isn't a lot of work time in pouring...." Read more

"I like this stuff because it cures in 10-15 minutes, and its super tough (not brittle like art epoxy resins or UV resins)..." Read more

23 customers mention23 positive0 negative

Customers like the cure of the art supplies. They mention that it cures super fast, sets very fast, and is a good, strong, quick-curing plastic that picks up detail very well.

"...I also use dye to change the color, mostly black. I also like the fast cure time (10 min). The plastic can handle negative curves in complex molds...." Read more

"...The final product is very strong and durable. I like how it cures very fast but that also means there isn't a lot of work time in pouring...." Read more

"...The SmoothCast-300 is a fantastic epoxy resin. BEWARE: It dries fast, very fast or within 2 minutes gets hard enough so it can't be poured...." Read more

"I like this stuff because it cures in 10-15 minutes, and its super tough (not brittle like art epoxy resins or UV resins)..." Read more

14 customers mention14 positive0 negative

Customers are satisfied with the detail of the product. They mention that it produces fine details and that it is a straightforward product.

"...Consistent quality casts that hold up to the test of time. Excellent detail, de-bubbles itself, hard but enough give to not be overly crisp and..." Read more

"...takes details great, paintable, don't need a pressure pot (its opaque white so internal bubbles aren't visible)..." Read more

"...On's Smooth Cast series is a very easy material to work with, reproduces fine detail, and can be colored with pigments like So Strong...." Read more

"...Very good details and very minimal bubbles" Read more

11 customers mention11 positive0 negative

Customers like the color of the product. They say it's easy to mix and pour, the mixture changes color as it begins to cure, and the resultant plastic is bright white and beautiful. It's strong after setting and takes pigment well, and it can be used with pigment. Customers appreciate that the individual contents are blue.

"I used this to make the sclera for doll eyes. This resin gives me the bright white base I need...." Read more

"...easy material to work with, reproduces fine detail, and can be colored with pigments like So Strong...." Read more

"...The plastic is strong after setting and takes pigment well, though it does light up if you are worried about that...." Read more

"...It does cure a brilliant pure white and easy to paint. I used an automobile spray primer and was able to paint the masks easily...." Read more

14 customers mention8 positive6 negative

Customers are mixed about the bubbles in the product. Some mention that it has very minimal bubbles, while others say that they are hard to remove and that they form in the mix. They also mention that they tend to bubble up on humid days and also develop blobs due to heat.

"...Excellent detail, de-bubbles itself, hard but enough give to not be overly crisp and fragile. Surprisingly durable." Read more

"...They tend to bubble up on humid days and also develop BLISTERS (big blobs) due to heat...." Read more

"...I stir with the handle of a plastic fork. I had no problem with bubbles...." Read more

"...😧 the chemical reaction was dramatic, it expanded and drastically bubbled over my mold. Hopefully I can get out of the mold...." Read more

Easy to use
5 Stars
Easy to use
I needed to create a seat for a model car. This was taken care of quite easily. While I was at it, I made a few other items for future use. Warning, this can be messy.
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Top reviews from other countries

Vincent Chichak
5.0 out of 5 stars Color
Reviewed in Canada on February 22, 2023
Size: Pint UnitVerified Purchase
nathalie giroux
5.0 out of 5 stars Works really well
Reviewed in Canada on April 21, 2022
Size: Gallon UnitVerified Purchase
Milivojevic MARKO
5.0 out of 5 stars Perfect
Reviewed in Germany on December 2, 2021
Size: Pint UnitVerified Purchase
Scott johnson
5.0 out of 5 stars Awesome
Reviewed in the United Kingdom on November 8, 2020
Size: Pint UnitVerified Purchase
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Scott johnson
5.0 out of 5 stars Awesome
Reviewed in the United Kingdom on November 8, 2020
Very good bought lots of this and will buy lots more easy to work with and great results all round
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susan christie
5.0 out of 5 stars Great product
Reviewed in Australia on May 21, 2022
Size: Pint UnitVerified Purchase