Shop for Urethane Casting Resins. Urethane casting products are two-part systems designed for tooling, low-volume production, and prototyping applications. Durometers range from 40 Shore A to 85 Shore D. Our products include soft, mid-range, hard, and rigid urethane elastomers. Stocked products typically ship in 2-5 business days. Can’t find what you need? Get a quote.