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: THI-VEX® is NOT compatible with MOLD STAR™ rubbers.