SMOOTH-CAST 300 are liquid plastics that are low viscosity casting resins. Applications for Smooth-Cast 300 Series Liquid Plastics include reproducing small to medium size sculptures, making prototype models, special effect props and decorative jewelry.

Properties:

• Produce castings that are bright white and virtually bubble free.
• Fully cured castings are tough, durable, machinable and paintable.
• Castings resist moisture and mild solvents. 
• Shore D hardness: 70.
• Pot life: 7 minutes.
• Cure time: 30 minutes at room temperature (73°F/23°C). 
• Colour: White.

• Ultra Low

Features:

• Can be colored with SO-Strong color tints but the SMOOTH-CAST 321 and SMOOTH-CAST 326 are better at accepting pigments and fillers.
• Low viscosity for easy mixing and pouring.
• Comes in 2 parts: Part A and Part B. Part A and Part B are to be mixed in 1A:1B volume. No weighing scale is necessary. 

Important:

• Applying A Release Agent - A release agent is necessary to facilitate demolding when casting into or over most surfaces. Use a release agent made specifically for mold making such as the Ease Release 200 available from our online store. A liberal coat of release agent should be applied onto all surfaces that will contact the plastic.
• Safety - Use in a properly ventilated area (“room size” ventilation). Wear safety glasses, long sleeves and rubber gloves to minimize contamination risk. Wear vinyl gloves only. Latex gloves will inhibit the cure of the rubber.
• Store and use material at room temperature (73°F/23°C). Warmer temperatures will drastically reduce working time and cure time. Storing material at warmer temperatures will also reduce the usable shelf life of unused material.