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Smooth-Cast® 57D

EZ-Spray® Silicone 22 vs. Smooth-Cast® 57DEZ-Spray® Silicone 22

Semi-Rigid Urethane Casting Resin

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Key Differences

Product Type
  • Silicone Rubber - Platinum Cure
  • Urethane Resins
Mixed Viscosity11,000 cps300 cps
Pot Life5 minutes3 minutes
Cure Time45 minutes30 minutes
Shore D Hardness57
Shore A Hardness22
ColorTranslucent GreenTranslucent White
Elongation @ Break450 %100 %
Disclaimer
Although we do our best to ensure the accuracy of this Compare Tool, Smooth-On offers no warranty either expressed or implied as to the reliability of the information contained herein. Smooth-On assumes no liability for loss or damage associated with use of the Compare Tool. If this is a critical project, we encourage you to review all of the technical data below and contact our Technical Service department with any questions or concerns.

All Technical Data

EZ-Spray® Silicone 22Smooth-Cast® 57D
Product Type
  • Silicone Rubber - Platinum Cure
  • Urethane Resins
Mixed Viscosity11,000 cps300 cps
Mix Ratio By Volume1A:1B1A:1B
Mix Ratio By Weight100A:93B
Pot Life5 minutes3 minutes
Cure Time45 minutes30 minutes
Shore D Hardness57
Shore A Hardness22
Specific Gravity1.08 g/cc1.05 g/cc
Specific Volume25.6 cu. in./lb.26.4 cu. in./lb.
ColorTranslucent GreenTranslucent White
Die B Tear Strength102 pli
Tensile Strength490 psi
Ultimate Tensile2,420 psi
Elongation @ Break450 %100 %
100% Modulus49 psi
Shrinkage<.001 in. / in.0.012 in. / in.
Useful Temperature (min)-65 °F
Useful Temperature (max)500 °F

Product Description

EZ-Spray® Silicone 22

EZ~Spray® Silicone 22 are sprayable silicones which cure quickly to soft rubbers with high elongation and tear strength. Liquid silicone is sprayed through the EZ~Spray® Junior Cartridge System which is an economical alternative to expensive spray equipment. After a suitable thickness is attained, EZ~Spray® Silicone 22 cures in about 45 minutes. EZ~Spray® Silicone cures with negligible shrinkage to strong, durable silicone rubbers good for production casting of polyester, epoxy or urethane resins, gypsum, concrete and other materials.

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Smooth-Cast® 57D

Smooth-Cast® 57D is a semi-rigid urethane plastic that offers a gradual cure profile (does not snap cure), making it suitable for machine or hand rotational casting.

Use For Rotational Casting - Once poured into a suitable rubber mold configuration, the mold can be rotated so that the resin mixture gradually coats the inside of the mold cavity. After an adequate wall thickness is attained inside the mold, the result is a cured hollow casting that is semi-rigid and highly impact resistant.

Use as a Casting Resin – Smooth-Cast® 57D can also be used as a casting resin for making solid, semi-rigid castings that are tough and durable.

Mix ratio is 1A:1B by volume. Working time is 3 minutes, demold time is 30 minutes and full cure properties are attained after 24 hours. Color is white translucent and the material is very easy to color with SO-Strong®, UVO® or Ignite® colorants. Cured resin is also easy to paint with acrylic paints or UreCoat® flexible coating for applications requiring thick, durable finishes.

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