Equinox 40 Slow Silicone Mold Making Putty - Trial Unit Easy to use platinum-cure silicone mold putty that is mixed and applied by hand. Mix Ratio: 1A:1B by volume Shore 40A Hardness Pot Life: 30 minutes - Cure Time: 4 hours Equinox Silicones are also FOOD SAFE and can be used for culinary applications. (See separate technical bulletin for usage instructions available at www.smooth-on.com).