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Smooth-Cast® 300

Smooth-Cast® 300 vs. EZ-Spray® Silicone 22EZ-Spray® Silicone 22

Bright White Liquid Plastic

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Key Differences

Product Type
  • Silicone Rubber - Platinum Cure
  • Urethane Resins
Mixed Viscosity11,000 cps80 cps
Pot Life5 minutes3 minutes
Cure Time45 minutes10 minutes
Shore D Hardness70
Shore A Hardness22
ColorTranslucent GreenWhite
Tensile Strength490 psi3,000 psi
Elongation @ Break450 %5 %
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® 300
Product Type
  • Silicone Rubber - Platinum Cure
  • Urethane Resins
Mixed Viscosity11,000 cps80 cps
Mix Ratio By Volume1A:1B1A:1B
Mix Ratio By Weight100A:90B
Pot Life5 minutes3 minutes
Cure Time45 minutes10 minutes
Shore D Hardness70
Shore A Hardness22
Specific Gravity1.08 g/cc1.05 g/cc
Specific Volume25.6 cu. in./lb.26.4 cu. in./lb.
ColorTranslucent GreenWhite
Die B Tear Strength102 pli
Tensile Strength490 psi3,000 psi
Tensile Modulus139,500 psi
Elongation @ Break450 %5 %
100% Modulus49 psi
Compressive Strength4,000 psi
Compressive Modulus45,800 psi
Flexural Strength4,510 psi
Flexural Modulus128,000 psi
Shrinkage<.001 in. / in.0.01 in. / in.
Heat Deflection Temp120 °F
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® 300

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 1A:1B by volume or 100A:90B by weight mix ratio. The differences between them are pot life and demold time.

These resins readily accept fillers (such as URE-FIL® 3 ) and can be colored with SO-Strong® or Ignite® color tints (Smooth-Cast® 325 series accepts pigments better than the Smooth Cast® 300 series). Fully cured castings are tough, durable, machinable and paintable. They resist moisture and mild solvents. Applications for Smooth-Cast® 300 Series Liquid Plastics include reproducing small to medium size sculptures, making prototype models, special effect props and decorative jewelry.

Those interested in making roto cast pieces should refer to the Smooth-Cast® 65D technical bulletin.

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Silicone Rubber - Tin Cure ›

Silicone Rubber - Platinum Cure ›

Urethane Rubber ›

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Adhesives ›

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