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Urethane Plastic - Casting Resins For Any Application  
Smooth-Cast® 300 Series Bright White Liquid Plastic
 Smooth-Cast® 300 Series Bright White Liquid Plastic
Smooth-Cast® 300 Series Bright 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. Vacuum degassing is not necessary. They offer the convenience of a one to one mix ratio (one part A to one part B by volume).

Fully cured castings are tough, durable, machinable and paintable. They resist moisture and mild solvents. Applications for Smooth-Cast® Liquid Plastics include reproducing small to medium size sculptures,making prototype models, roto cast pieces, and special effect props.

  • Smooth-Cast® 300Q - 4-5 minute demold time
  • Smooth-Cast® 300 - 10 minute demold time
  • Smooth-Cast® 305 - 30 minute demold time
  • Smooth-Cast® 310 - 2-4 hour demold time

Smooth-Cast® 320 Series Liquid Plastic - Easier To Pigment
 Smooth-Cast® 320 Series Liquid Plastic - Easier To Pigment
Smooth-Cast® 320 Series Liquid Plastic - Easier To Pigment
The Smooth Cast® 320 Series consists of new ultra-low viscosity/low cost casting resins that yield virtually bubble-free castings. Smooth Cast® 320 Series resins pigment better and are lower in cost. Applications for Smooth Cast® 320 Series resins include reproducing small to medium size sculptures, making prototype models, special effect props, decorative jewelry, etc.

Easy to mix and pour, these resins offer the convenience of a one to one mix ratio (one Part A to one Part B by volume). Fully cured castings are tough, durable, machinable and paintable. They resist moisture and mild solvents.

  • Smooth-Cast® 320 - 10 minute demold time
  • Smooth-Cast® 321 - 30 minute demold time
  • Smooth-Cast® 322 - 2-4 hour demold time

Smooth-Cast® 325 Colormatch™ For True Color Representation
 Smooth-Cast® 325 Colormatch™  For True Color Representation
Smooth-Cast® 325 Colormatch™ For True Color Representation
Smooth-Cast® ColorMatch® plastics are fast-cast resins that were developed specifically for adding color pigments and fillers to achieve true color representation or filler effect. The ColorMatch® Series is formulated "color neutral". Small amounts of pigment will yield accurate, vivid colors from cured castings (use of Smooth-On SO-Strong® pigments is highly recommended).

Because of its neutral color, the ColorMatch® Series is ideal for creating marble and wood grain casting effects, or duplicating the look of real metal by adding bronze, brass or other metal powder (see Smooth-On technical bulletin for metal cold casting).

  • Smooth-Cast® 325 ColorMatch® - 10 minute demold time
  • Smooth-Cast® 326 ColorMatch® - 60 minute demold time
  • Smooth-Cast® 327 ColorMatch® - 2-4 hour demold time

Smooth-Cast® ROTO Liquid Plastic
 Smooth-Cast® ROTO Liquid Plastic
Smooth-Cast® ROTO Liquid Plastic
Smooth-Cast ROTO ® is a low viscosity liquid plastic that gradually becomes thicker, making it ideal for rotational casting applications. Castings will be hollow and lightweight but have the appearance of being solid, allowing you to use less material to attain the same finished look (substantially lowering your material costs).

Fully cured castings are semi-rigid and exhibit good impact resistance. Castings resist moisture and mild solvents and can be machined, sanded and painted. ROTO® can also be cast solid for a variety of industrial and art-related applications.

  • Smooth-Cast® ROTO - 10 – 15 minute demold time
    (depending on mass and casting wall thickness)

Smooth-Cast® Semi-Rigid Urethane Casting Resins
 Smooth-Cast® Semi-Rigid Urethane Casting Resins
Smooth-Cast® Semi-Rigid Urethane Casting Resins
Smooth-Cast® 45D, 60D & 61D are low-cost semi-rigid urethane casting resins that cure quickly to semi-rigid plastics that offer excellent impact resistance. They are easy-to-use: (mix ratio is 1A:1B by volume) and have low viscosity for minimal bubble entrapment. Vibrant colors are possible by adding SO-Strong®color tints.

Smooth-Cast® semi-rigid plastics are virtually unbreakable and will really take a beating. They also offer exceptional abrasion resistance. They're good for making high-impact resistance tools, prototypes, abrasion resistant parts, foundry patterns, roller facings, vibration pads,fast concrete stamping pads, etc.

  • Smooth-Cast® 45D - 30 minute demold time
  • Smooth-Cast® 60D - 30 minute demold time
  • Smooth-Cast® 61D - 60 minute demold time

Smooth-Cast® 385 Mineral Filled Liquid Plastic
 Smooth-Cast® 385 Mineral Filled Liquid Plastic
Smooth-Cast® 385 Mineral Filled Liquid Plastic
Smooth-Cast® 385 is a mineral filled urethane casting resin that is very hard and durable. When Parts A and B are mixed in proper proportion (1A:5B by weight), the material cures at room temperature with virtually no shrinkage. Smooth-Cast® 385 has high compressive and flexural strength. Fully cured castings are tough, machinable and paintable. Color effects are possible by adding pigment dispersions. They resist moisture and mild solvents.

Smooth-Cast® 385 is ideal for making industrial production parts, foundry patterns, vacuum forming molds, and some ceramic applications.

  • Smooth-Cast® 385 - 2 hour demold time

Smooth-Cast® ONYX®
 Smooth-Cast® ONYX®
Smooth-Cast® ONYX®
Smooth-Cast ONYX® is a mercury-free urethane resin that cures quickly at room temperature to a deep black, solid plastic. ONYX® offers the convenience of a 1A:1B by volume mix ratio and has a very low viscosity, so it is easy to mix and pour. ONYX® has an ultimate shore hardness of 80D and offers higher physical properties and higher heat resistance vs. other general purpose resins.

Advantages that ONYX® offers over other resins;
• If you desire a black casting, adding color pigment is not necessary
• Cured plastic is ultra-black and darker than competitive black resins
• Cured ONYX® plastic can be polished and buffed to a high gloss shine
• ONYX® offers higher heat resistance (to 200°F /94° C at room temperature) vs. competitive black resins
• Unlike other black resins, ONYX®does not contain mercury
• ONYX® is less expensive vs. other black resins.

Applications include reproducing sculpture, making prototypes and potting / encapsulation. 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, etc.


Plasti-Paste™ Trowelable Plastic
 Plasti-Paste™ Trowelable Plastic
Plasti-Paste™ Trowelable Plastic
Plasti-Paste® is a two component fiber resin that is designed for vertical surface application. Part A is a liquid and Part B is a paste. Mix ratio is 1A : 3B by volume (41A:100B by weight). It has no odor and pot life is 8 – 10 minutes depending on mass. Demold time (can be handled) is about 90 minutes depending on mass.
Plasti-Paste® holds a vertical surface without sagging and cures to a strong, durable and lightweight plastic. Suitable as a mother mold / support shell (reinforces shape of rubber mold during casting), or as a laminating material. Can be pigmented with So-Strong® color tints from Smooth-On. Add cabosil or other filler as an extender or for special effects.

Crystal Clear® Series - Optically Clear Liquid Plastic
 Crystal Clear® Series - Optically Clear Liquid Plastic
Crystal Clear® Series - Optically Clear Liquid Plastic
Crystal Clear® Series resins are water white clear and made specifically for applications that require absolute clarity. These rigid urethane casting resins differ only in working and demold times.

Low viscosity ensures easy mixing and pouring. Crystal Clear® products cure at room temperature with negligible shrinkage. Cured castings are UV Resistant and are not brittle. Vibrant colors and color effects are achieved by adding SO-Strong® color tints. Applications include encapsulation, making prototype models, lenses, sculpture reproductions, decorative cast pieces, jewelry, prototype models, special effects and props. Heat curing is essential to realize full physical properties. Read the Technical Bulletin for full details.

CAUTION: NOT FOR HOME USE. THIS PRODUCT IS FOR INDUSTRIAL USE ONLY - Proper ventilation, a NIOSH Approved Respirator and Protective Clothing are required to minimize the risk of inhalation and dermal sensitization. If breathing is affected or a dermal rash develops, immediately cease using this product and seek medical attention. Read MSDS before using.

  • Crystal Clear® 202 - 90 min. cure time - for 1/16" - ½" thick castings
  • Crystal Clear® 200 - 16 hour cure time - for ½" - 3" thick castings
  • Crystal Clear® 204 - 48 hour cure time - for 3" - 6" thick castings
  • Crystal Clear® 206 - 48 hour cure time - greater than 6" thick
  • Crystal Clear® 220 - MUST BE HEAT CURED

Shell Shock® Brushable Liquid Plastic
 Shell Shock® Brushable Liquid Plastic
Shell Shock® Brushable Liquid Plastic
Shell Shock® FAST and Shell Shock® SLOW are thixotropic plastics that self -thicken when mixed and can be brushed onto a variety of surfaces or into rubber molds. When Parts A and B are mixed in proper proportion (1A:4B by volume or 1A:5B by weight), material cures at room temperature with virtually no shrinkage to a hard, durable plastic that exhibits good compressive and flexural strength.

Fully cured castings are rigid and can be sanded, primed and painted. Color effects are possible by adding SO-Strong Color Tints. Shell Shock® is ideal for making fast, lightweight rigid molds for creating silicone appliances and effects (use as a replacement for gypsum molds). You can also brush a "gel coat" into a rubber mold and back it up with rigid foam, creating a highly detailed lightweight casting.

This product can also be brushed onto foams as an impact resistant coating that can be sanded, primed and painted (minimum 3/8" thickness recommended). Shell Shock® can also be used to make rigid support shells for brush on rubber molds.

Shell Shock® FAST working time is 3 minutes. Shell Shock® SLOW working time is 8 minutes.

  • Shell Shock® FAST - full cure 1 hour at 3/8" thickness
  • Shell Shock® SLOW - full cure 5 hours at 3/8" thickness

Feather Lite® Liquid Plastic - It Floats In Water!
 Feather Lite® Liquid Plastic - It Floats In Water!
Feather Lite® Liquid Plastic - It Floats In Water!
Feather Lite® is a heavily filled low-density urethane casting resin. Cured plastic is lightweight (it floats in water!) and has a much lower density than other casting resins. Feather Lite® features a convenient 1A:1B by volume mix ratio and mixes easily (pre-mixing of parts A & B is necessary).

Cured plastic is strong and can be carved, machined, drilled, sanded, etc. Feather Lite® can be pigmented with SO-Strong® color tints prior to casting and finished castings can be painted. And because this product is low-density, it yields more plastic per pound/kg. than other casting resins, the cost per casting is low.

Feather Lite® can be used for a variety of art or industrial design related applications including reproducing sculpture, making fishing lures, prototype model making, casting doll heads and figures, and many more applications.

  • Feather Lite® - 2 hour demold time

SMASH!® Breakaway Plastic
 SMASH!® Breakaway Plastic
SMASH!® Breakaway Plastic
SMASH!® Plastic is a new urethane liquid plastic designed to shatter/crumble on impact ("breakaway glass"). SMASH!® is water clear and, once fully cured, shatters like glass. It can be cast solid in thin sections to make window panes or rotationally cast to form hollow bottles, jars or other glass-like objects to be used as breakable props for movie and stage productions. Maximum recommended thickness is 1/8" (0.33 cm.).
SMASH!® is a room temperature cure system that is easy to use - mixed 1A: 1B by volume (1 cup + 1 cup). Low viscosity ensures easy mixing and pouring. Cured castings are UV RESISTANT. Vibrant colors and color effects are achieved by adding pigment dispersions.

CAUTION: NOT FOR HOME USE. THIS PRODUCT IS FOR INDUSTRIAL USE ONLY.
Proper ventilation, A NIOSH Approved Respirator and Protective Clothing are required to minimize the risk of inhalation and dermal sensitization. If breathing is affected or a dermal rash develops, immediately cease using this product and seek medical attention. Read MSDS before using.

  • SMASH!® Plastic - 90 minute demold time - can be broken after 6 hours

TASK® Series Liquid Plastics - Performance Casting Resins
 TASK® Series Liquid Plastics - Performance Casting Resins
TASK® Series Liquid Plastics - Performance Casting Resins

TASK® Plastics is a new generation of performance urethane casting resins that offer superior physical properties compared to our popular Smooth-Cast line of general purpose casting resins.

TASK® Plastics feature convenient mix ratios by volume (pbv) or weight (pbw), low viscosities, high tensile and flexural strength, as well as high flexural modulus. These resins are designed for casting in thicknesses up to ½" (1.27 cm).

TASK® 2 & 3
High strength, low viscositybutton_icon_tbbutton_icon_msds
TASK® 4Very strong in thin walled sectionsbutton_icon_tbbutton_icon_msds
TASK® 5 & 6 Lowest cost performance plastics anywherebutton_icon_tbbutton_icon_msds
TASK® 8Heat resistant urethane plasticbutton_icon_tb button_icon_msds
TASK® 9 COLORMATCH Neutral amber for color matching and pigmentingbutton_icon_tbbutton_icon_msds
TASK® 11Semi-rigid resin - dry food applications
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TASK® 12Virtually indestructable - highest impact resistancebutton_icon_tbbutton_icon_msds
TASK® 13 & 14
Black semi-rigid urethane casting resins
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TASK® 15For machine rotocasting - high impact resistancebutton_icon_tbbutton_icon_msds
TASK® 18Aluminum filled mass casting resinbutton_icon_tb button_icon_msds
TASK® 21Higher heat deflection button_icon_tbbutton_icon_msds

C-1508® Aluminum Filled Ultra-Rigid Casting Resin
 C-1508® Aluminum Filled Ultra-Rigid Casting Resin
C-1508® Aluminum Filled Ultra-Rigid Casting Resin

C-1508® is now TASK® 18, part of the TASK® series of liquid plastics

Click Here To Be Redirected To The TASK® Page


C-1509® Semi-Rigid Liquid Plastic - High Impact Resistance
 C-1509® Semi-Rigid Liquid Plastic - High Impact Resistance
C-1509® Semi-Rigid Liquid Plastic - High Impact Resistance

C-1509® is now TASK® 11, part of the TASK® series of liquid plastics

Click Here To Be Redirected To The TASK® Page

C-1515® and C-1520® Semi-Rigid Liquid Plastics
 C-1515® and C-1520® Semi-Rigid Liquid Plastics
C-1515® and C-1520® Semi-Rigid Liquid Plastics
C-1515® and C-1520® are now TASK® 13 and TASK® 14, part of the TASK® series of liquid plastics

Click Here To Be Redirected To The TASK® Page

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2000 Saint John Street, Easton PA 18042 | Order Desk: 800.762.0744 | Fax: 610.252.6200 | Tech Help: 610.252.5800

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