Freeman Clear Silicone is a two part component, room temperature vulcanizing (RTV) silicone rubber compound. Designed specifically for mold making, it is an ideal rubber for reproducing intricate detail and maintaining close tolerances. It features low viscosity for easy pouring and excellent clarity for ease of use and cutting visibility. It also features high tear strength and the ability to endure temperatures up to 350 degrees Fahrenheit. Advantages of silicone over urethane molds include: safer to work with, self-releasing, extreme shelf life, water clear, and can be heat accelerated to cut down on curing time.