Smooth-Cast 300™ is an ultra-low viscosity urethane casting resin that cures fast into a tough, machinable plastic. Mix 1A:1B by volume and get bright white, virtually bubble-free castings without vacuum degassing.
Smooth-Cast 300™ is a fast-curing, ultra-low viscosity urethane casting resin designed for high-detail castings with minimal bubbles. It cures quickly into a rigid, durable plastic that can be machined and painted, making it a go-to choice for prototypes, props, and production runs where speed matters.
Features
Ultra-low viscosity for excellent detail capture
Bright white castings that are virtually bubble free, and vacuum degassing is not necessary
Easy 1A:1B by volume mix ratio
Fast turnaround with short pot life and quick cure
Fully cured parts are tough, durable, machinable, and paintable
Resists moisture and mild solvents
Key Specifications (at 73°F / 23°C)
Mix ratio: 1A:1B by volume (or 100A:90B by weight)
Pot life: 3 minutes
Cure time: about 10 minutes (demold time varies with mass and mold configuration)
