Tough-Cast 65D Semi-Rigid Polyurethane Casting Resin, 1 Gallon, 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 2 Pint 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.
• Sized for Mid-Scale Builds – The 1 Gallon kit supports repeated casting and medium batch runs. Ideal for workshops or experienced makers building tough prototypes and rugged parts.