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.
|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|
|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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