Alumilite Quick Set flexible moldmaking rubber is perfect for making a general purpose mold with medium hardness. Perfect for simple 1 and 2 piece molds. Easy to use silicone rtv cures overnight. Alumilite Silicone is a 10:1 mix ratio, has a 30 minute open time, demolds in 8 to 18 hours, has a tear strength of 20. Final mold can be used in a temperature range of -67ºF to 395ºF. Vacuum degassing is not required. Packaged in a 1 lb container.