RU-485 A/B—80 A Shore is a liquid, two-component, Urethane Elastomer RTV that is easily processed. This system provides a flexible rubber compound. Molds are used to cast concrete, wax, and plaster parts. In addition, molds can be used to cast various resins and foams when properly prepared. Silpak RU-485 Liquid Rubber is formulated for good economy with high performance and durability.