Mold Max Silicones are tin-cured silicone rubber compounds that have exceptional working properties and library life. Mold Max Silicones feature Smooth-On's exclusive “Libra” catalyst for long library life. Mold Max silicones can be pigmented with Silc Pig silicone colorants. Pot life for the pourable silicones is 45 minutes and they cure overnight at room temperature. Vacuum degassing mixed material using a vacuum pump and chamber to remove entrapped air is recommended.