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Mold Star™ 30

Mold Star™ 30 vs. EZ-Spray® Silicone 22 vs. EZ-Spray® FoamEZ-Spray® Silicone 22 versus EZ-Spray® Foam

1A:1B Mix By Volume Platinum Silicone Mold Rubber

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Key Differences

Product Type
  • Silicone Rubber - Platinum Cure
  • Mix and Pour Expanding Foams
  • Silicone Rubber - Platinum Cure
Mixed Viscosity11,000 cps400 cps12,500 cps
Pot Life5 minutes13 seconds45 minutes
Cure Time45 minutes10 minutes6 hours
Shore A Hardness2230
Specific Gravity1.08 g/cc0.128 g/cc1.12 g/cc
ColorTranslucent GreenTanBlue
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 22EZ-Spray® FoamMold Star™ 30
Product Type
  • Silicone Rubber - Platinum Cure
  • Mix and Pour Expanding Foams
  • Silicone Rubber - Platinum Cure
Mixed Viscosity11,000 cps400 cps12,500 cps
Mix Ratio By Volume1A:1B1A:1B1A:1B
Pot Life5 minutes13 seconds45 minutes
Tack Free Time2 minutes
Cure Time45 minutes10 minutes6 hours
Shore A Hardness2230
Expansion (approximate)7 times
Specific Gravity1.08 g/cc0.128 g/cc1.12 g/cc
Specific Volume25.6 cu. in./lb.24.7 cu. in./lb.
ColorTranslucent GreenTanBlue
Die B Tear Strength102 pli88 pli
Tensile Strength490 psi420 psi
Elongation @ Break450 %339 %
100% Modulus49 psi96 psi
Shrinkage<.001 in. / in.<.001 in. / in.
Useful Temperature (min)-65 °F-65 °F
Useful Temperature (max)500 °F450 °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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EZ-Spray® Foam

EZ~Spray® Foam is a polyurethane foam compound that can be conveniently sprayed using Smooth-On’s EZ~Spray® Junior System. Foam cures quickly to strong, lightweight and impact resistant 8 lb. rigid foam that can be used for a variety of applications including making lightweight castings. Foam can also be sprayed over certain rubber mold configurations as a mother mold material. For more information, refer to SmoothOn’s EZ~Spray® Junior manual and video.

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Mold Star™ 30

Mold Star™ mold rubbers are easy to use platinum silicones which are mixed 1A:1B by volume (no weighing scale necessary). Mold Star™ silicones feature relatively low viscosities and vacuum degassing is not required for most applications. Mold Star™ 30 is a harder material, with a 30A Shore hardness.

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