This mold making tutorial video shows how to make a two piece silicone block mold using Mold Star 15. The finished mold can be used for casting resin, wax, foam, and many other materials. The original model is a plastic sphere. The 2-part mold should be split along the horizontal axis.
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.