Tough-Cast 65D Semi-Rigid Polyurethane Casting Resin, 32 Oz High Impact & Heat Resistant, Ideal for Prototypes, Reproductions, Rollers, End-Use Parts, Durable Resin for DIY Projects, Molds

SPRESIN Tough-Cast 65D is a semi-rigid polyurethane casting resin engineered to deliver near-indestructible results. With high impact resistance, abrasion durability, and excellent thermal performance, it’s built for serious makers and pros who need rugged, production-ready parts. Its dense, thermoplastic-like finish mimics the strength and feel of materials like ABS—ideal for prototyping, end-use parts, and heavy-duty cast components. This 1:1 ratio resin system is easy to mix by hand or with automated dispensing equipment. It features a fast 2-minute working time and cures within 30 minutes, making it perfect for shops and makers that value efficiency and throughput. Tough-Cast 65D also features zero solvents and very low shrinkage, helping ensure clean results and predictable performance. It’s especially well-suited for repeated casting in RTV silicone molds and delivers consistent performance across both large and thin cross-sections. Whether you’re casting prototype parts, rugged reproductions, or industrial rollers, this semi-rigid resin excels where standard casting resins fail. The 32 oz kit offers just the right amount for small runs or test projects, letting you dial in performance without excess waste. Whether you're a product developer, engineer, or DIY enthusiast working with resin molds, SPRESIN Tough-Cast 65D gives you durable results with minimal fuss.

• Virtually Indestructible Resin – Tough-Cast 65D is built for strength. This 2-part polyurethane casting resin delivers outstanding durability, ideal for functional prototypes, rollers, and industrial parts.
• Semi-Rigid Thermoplastic Feel – Designed to mimic thermoplastics like ABS, this semi-rigid resin offers great structural support while maintaining some flexibility in thinner castings.
• Fast Working Time – With a 2-minute working time and 30-minute cure, this resin is ideal for fast-paced workflows. Great for repeated mold use and quick-turn projects.
• Superior Resistance – Excellent abrasion, impact, and heat resistance make it a go-to for industrial molds, high-use parts, and long-term casting needs.
• Great for Prototyping – This 32 oz kit is ideal for casting rugged models, production parts, or replacement components. Works well with RTV silicone molds for clean results.