ProtoFast custom medical parts from Rubber Industries (Shakopee, MN) are available in custom rubber and liquid silicone rubber. The ProtoFast service uses production-grade tooling and dedicated molding equipment to produce prototype quantities. Various silicone and rubber formulation options for color and performance can be evaluated. The parts are used as custom seals, insulators, diffusers, valves, gaskets, bellows, and components used in non-implantable medical devices and equipment. The liquid silicone rubber has low compression set and resists effects of light, ozone, and moisture. LSR grades include UL, FDA, Heal Care, oil-resistant, and high-strength.