Smooth Cast 380

Unit Size	Net Weight
Pint Kit	2 lb
Gallon Kit	18 lb

 

Smooth-Cast¨ 380 is a filled, high density casting resin formulated for a variety of tooling applications. This no-odor resin features a convenient 1A:1B mix ratio by volume, a 6 minute pot-life and cure time of about 60 minutes depending on mass and temperature.
Low viscosity ensures minimal bubble entrapment and long term shrinkage of cured resin is very low. Cured material is very strong and can be machined, drilled, sanded, etc. Color can be added with SO-Strong¨ color tints.

Technical Properties

Mix Ratio by Weight	1A:1B
Mix Ratio by Volume	1A:1B
Pot Life	6 minutes
Tack Free Time	60 minutes
Color	Tan
Shore Hardness	82D
Mixed Viscosity	1,140 cps
Shrinkage	0.00025 in./in.
Specific Volume	15.9 cu. in./lb.
Specific Gravity	1.74g/cc
Tensile Strength	3,550 psi
Elongation @ Break	1.43%
Compressive Modulus	126,000 psi
Tensile Modulus	490,000 psi
Flexural Strength	4,870 psi
Flexural Modulus	315,000 psi
Compressive Strength	7,860 psi
Heat Deflection Temp	125¼F

 

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