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Smooth-Cast® 61D

Smooth-Cast® 61D vs. EZ-Spray® Silicone 22EZ-Spray® Silicone 22

Semi-Rigid Urethane Casting Resins

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Key Differences

Product Type
  • Silicone Rubber - Platinum Cure
  • Urethane Resins
Mixed Viscosity11,000 cps430 cps
Pot Life5 minutes7 minutes
Cure Time45 minutes60 minutes
Shore D Hardness61
Shore A Hardness22
ColorTranslucent GreenTranslucent White
Tensile Strength490 psi2,420 psi
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® 61D
Product Type
  • Silicone Rubber - Platinum Cure
  • Urethane Resins
Mixed Viscosity11,000 cps430 cps
Mix Ratio By Volume1A:1B1A:1B
Mix Ratio By Weight100A:93B
Pot Life5 minutes7 minutes
Cure Time45 minutes60 minutes
Shore D Hardness61
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 psi2,420 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® 61D

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. New Formulations – New Look! Smooth-Cast® 61D is newly reformulated with a translucent white appearance and improved physical properties. All Smooth-Cast semi rigids are now mercury free and phthalate free. 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® color tints or Ignite® color pigments.

Suitable for making impact resistance prototypes, abrasion resistant parts, climbing holds, foundry patterns, roller facings, vibration pads, etc. 

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