Smooth-Cast 321 resin is an off-white bone colored resin often used when making replica skulls, bones and teeth. Fully cured castings are tough, durable, machinable and paintable. They resist moisture and mild solvents.
|Mix Ratio By Volume||1A:1B|
|Mix Ratio By Weight||100A:90B|
|Specific Gravity||1.05 g/cc|
|Specific Volume||26.4 cu. in./lb.|
|Pot Life||9 minutes|
|Cure Time||30 minutes|
|Tensile Strength||3,000 psi|
|Elongation @ Break||8 %|
|Compressive Modulus||40,300 psi|
|Shrinkage||0.007 in. / in.|
|Shore Hardness||70 D|
|Heat Deflection Temp||140 °F|
|Tensile Modulus||138,000 psi|
|Flexural Strength||3,500 psi|
|Flexural Modulus||110,000 psi|
|Compressive Strength||3,550 psi|
|Mixed Viscosity||80 cps|
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