Smooth-Cast 300

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)

• Shore hardness: 70D

• Mixed viscosity: 80 cps

• Heat deflection temperature: 120°F / 50°C