Ease Release® 200 is an excellent general purpose release agent for making molds and casting parts. This product will release urethane rubber, urethane resins, polyester resins, RTV silicones, and thermoplastic polymers. EASE RELEASE 200 is effective on aluminum, chrome, RTV silicone, epoxy, rubber, and steel molds. Ideal For Releasing: Urethane Rubber From Original Models Urethane Plastic From Urethane Rubber Silicone Rubber From Original Models Silicone Rubber From Silicone Rubber Urethane Plastic From Silicone Rubber.