Smooth-Cast™ 57D

Semi-Rigid Urethane Casting Resin

The Smooth-Cast™ Semi-Rigid line of low-cost semi-rigid urethane casting resins cure quickly to semi-rigid plastics that offer exceptional strength and impact resistance.

Smooth-Cast 45D, 60D and 61D are newly reformulated with a translucent white appearance and improved physical properties. All Smooth-Cast semi rigids are now mercury free and phthalate free.

Smooth-Cast™ 57D - Semi-Rigid Urethane Casting Resin
How Does It Work?
Watch 1-Minute Video

Quick Tech Data

  • 1A:1B

    Mix Ratio By Volume

  • 3 minutes

    Pot Life

  • 30 minutes

    Cure Time

  • 57 D

    Shore Hardness

  • Translucent White


These plastics are easy-to-use (mix ratio is 1A:1B by volume) and have low viscosities for minimal bubble entrapment. Vibrant colors are possible by adding SO-Strong™, UVO™ or Ignite™ colorants.

These semi-rigid plastics are good for making impact resistant prototypes, models, toys, props, climbing holds, etc. 

NOTE: Smooth-Cast™ 57D and Smooth-Cast™ 65D are also suitable for rotational casting applications. Do not use other Smooth-Cast™ semi-rigid plastics for roto casting.

Smooth-Cast™ 57D - Semi-Rigid Urethane Casting Resin


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In stock

Available Sizes

Smooth-Cast 57D - Trial Size

Net Wt: 0.94 kg

*Vat Included

*Product Packaging May Vary

Smooth-Cast 57D - 1 Gallon Unit

Net Wt: 7.53 kg

*Vat Included

*Product Packaging May Vary