Smooth Cast 385 Tool Resin

Unit Size	Net Weight
Gallon Kit	12 lb
Five Gallon Kit	60 lb

 

Smooth-Cast 385 is a Slow-setting mineral filled urethane casting resins that are very hard and durable. When Parts A and B are mixed in proper proportion (1A:5B by weight), SC 385 cures at room temperature with virtually no shrinkage.

Technical Properties

Mix Ratio by Weight	1A:5B
Mix Ratio by Volume	N/A
Pot Life	20 minutes
Cure Time	2 hours
Color	Beige
Shore Hardness	85D
Mixed Viscosity	3,000 cps
Shrinkage	0.0006 in./in.
Specific Volume	17.3 cu. in./lb.
Specific Gravity	1.60g/cc
Tensile Strength	3,100 psi
Elongation @ Break	1%
Compressive Modulus	400,000 psi
Tensile Modulus	400,000 psi
Flexural Strength	5,900 psi
Flexural Modulus	433,000 psi
Compressive Strength	8,500 psi
Heat Deflection Temp	135¼F

 

These rigid urethane casting resins differ only in working and demold times. Both have high compressive and flexural strength. Fully cured castings are tough, machinable and paintable. Color effects are possible by adding pigment dispersions. They resist moisture and mild solvents. SC 385 is ideal for making industrial production parts, foundry patterns, vacuum forming molds, and some ceramic applications.
How do I remove release agent from my cured urethane casting if I want to prime or paint the casting?
Removing a silicone-based release agent from your cured urethane casting is not easy. The most effective way is to sand blast or bead blast the surface of your casting. However, sand blasting removes a micro thin layer of the castingÕs surface. If not done properly, you can damage or remove fine detail. Soap Wipe or brush the casting with a soap that has high alkali content. Cascade brand dishwashing gel is highly alkaline and also contains baking soda, which is an advantage. Solvents Wipe or brush the casting with Acetone, Toluene, Isopropyl Alcohol or Mineral Spirits.
Important: follow all safety precautions when using flammable liquids. You can then prime and paint your casting.

Technical Bulletin

PRODUCT ADVISORY:
The products listed below are currently SPECIAL ORDER items and require pre order.
Lead times may vary - For more information please contact our staff.

796910 - Smooth Cast 385 Tool Resin - Five Gallon Kit