Smooth-On Mold Star 30

Mold Star® 30

Mold Star® 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.

Mold Star® silicones cure to soft, strong rubbers which are tear resistant and exhibit very low long term shrinkage. Molds made with Mold Star® will last a long time in your mold library and are good for casting wax, gypsum, resins, concrete and other materials. Cured Mold Star® rubber is heat resistant up to 450°F (232°C) and is suitable for casting low-temperature melt metal alloys. Note: Mold Star® rubbers are not intended for brush-on moldmaking.

Note: This product will not cure against surfaces containing sulfur, even when sealed.

Data At-A-Glance

Specific Gravity 1.12 g/cc
Specific Volume 24.7 cu. in./lb.
Pot Life 45 minutes
Cure Time 6 hours
Shore Hardness 30 A
Tensile Strength 420 psi
100% Modulus 96 psi
Elongation @ Break 339 %
Die B Tear Strength 88 pli
Color Blue
Mix Ratio By Volume 1A:1B
Mix Ratio By Weight 100A:96B
Shrinkage <.001 in. / in.
Useful Temperature (max) 450 °F
Useful Temperature (min) -65 °F
Mixed Viscosity 12,500 cps

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