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Smooth-Cast™ 325

Smooth-Cast™ 325 vs. EZ-Spray® Silicone 22EZ-Spray® Silicone 22

Ultra Low Viscosity Liquid Plastics

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Key Differences

Product Type
  • Silicone Rubber - Platinum Cure
  • Urethane Resins
Mixed Viscosity11,000 cps100 cps
Pot Life5 minutes2.5 minutes
Cure Time45 minutes10 minutes
Shore D Hardness72
Shore A Hardness22
ColorTranslucent GreenClear Amber
Tensile Strength490 psi3,170 psi
Elongation @ Break450 %10 %
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™ 325
Product Type
  • Silicone Rubber - Platinum Cure
  • Urethane Resins
Mixed Viscosity11,000 cps100 cps
Mix Ratio By Volume1A:1B1A:1B
Mix Ratio By Weight115A:100B
Pot Life5 minutes2.5 minutes
Cure Time45 minutes10 minutes
Shore D Hardness72
Shore A Hardness22
Specific Gravity1.08 g/cc1.07 g/cc
Specific Volume25.6 cu. in./lb.25.9 cu. in./lb.
ColorTranslucent GreenClear Amber
Die B Tear Strength102 pli
Tensile Strength490 psi3,170 psi
Tensile Modulus140,000 psi
Elongation @ Break450 %10 %
100% Modulus49 psi
Compressive Strength3,500 psi
Compressive Modulus36,500 psi
Flexural Strength3,690 psi
Flexural Modulus101,000 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™ 325

The Smooth-Cast™ 325, 326 & 327 ColorMatch™ Series plastics are urethane 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 using So-Strong™ tints UVO™ pigments or Ignite™ color pigments. The ColorMatch™ Series offers the convenience of a 1A: 1B mix ratio by volume and has a very low viscosity. Demold times range from about 10 minutes to 2-4 hours (depending on product, mass and mold configuration). Note: Large mass castings will get very hot and shrink more, depending on mold configuration.

The ColorMatch™ Series also readily accept fillers (such as URE-FIL™ 3 from Smooth-On). Because of its neutral color, Smooth-Cast™ 325 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. Applications for the ColorMatch™ Series plastics include making pigmented prototype models or figures, special effect props, reproducing small to medium size sculptures, decorative jewelry, etc.

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