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EpoxAcast™ 655 + 103 Hardener

Smooth-Cast™ 45D vs. EpoxAcast™ 655 + 103 Hardener

Aluminum Filled Casting Epoxy Resin

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Smooth-Cast™ 45D

Smooth-Cast™ 45D vs. EpoxAcast™ 655 + 103 HardenerEpoxAcast™ 655 + 103 Hardener

Semi-Rigid Urethane Casting Resins

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Key Differences

Product Type
  • Epoxy Casting and Laminating Resins
  • Urethane Resins
Mixed Viscosity23,000 cps250 cps
Mix Ratio By VolumeN/A (gram scale required)1A:1B
Pot Life3.5 hours5 minutes
Cure Time24 hours30 minutes
Shore D Hardness9045
Specific Volume16.7 cu. in./lb.25.2 cu. in./lb.
ColorGreyTranslucent White
Shrinkage0.0006 in. / in.0.007 in. / in.
Disclaimer
Although we do our best to ensure accuracy, Smooth-On offers no warranties, promises, and/or representations of any kind, either expressed or implied, as to the accuracy, completeness, or reliability of the information contained on this Compare Tool, nor suitability of the information contained herein to your particular circumstances. Smooth-On assumes no liability for losses or damages of whatever nature (direct, indirect, consequential or other) associated with your use, or inability to use, the Compare Tool, or from your use (or failure to use) the information contained herein. Other useful tools include product technical bulletins and our extensive FAQ section. You can also contact our technical support team.

All Technical Data

EpoxAcast™ 655 + 103 HardenerSmooth-Cast™ 45D
Product Type
  • Epoxy Casting and Laminating Resins
  • Urethane Resins
Mixed Viscosity23,000 cps250 cps
Mix Ratio By Volume1A:1B
Mix Ratio By Weight100A:12B100A:93B
Pot Life3.5 hours5 minutes
Cure Time24 hours30 minutes
Shore D Hardness9045
Specific Gravity1.66 g/cc1.10 g/cc
Specific Volume16.7 cu. in./lb.25.2 cu. in./lb.
ColorGreyTranslucent White
Tensile Strength1,560 psi
Tensile Modulus2,040,000 psi
Ultimate Tensile4,810 psi
Tensile Elongation0.54 %
Elongation @ Break100 %
Compressive Strength12,500 psi
Compressive Modulus125,500 psi
Flexural Strength7,660 psi
Flexural Modulus1,403,000 psi
Shrinkage0.0006 in. / in.0.007 in. / in.
Heat Deflection Temp135 °F
Thermal Conductivity0.675 W/M*K

Product Description

EpoxAcast™ 655 + 103 Hardener

EpoxAcast™ 655 (formerly Metalset™ A-30) is a versatile aluminum filled castable epoxy resin that is very hard and strong. It is dimensionally stable, even when mass cast up to 512 in³ / 8,390 cm³.

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Smooth-Cast™ 45D

The Smooth-Cast™ Semi-Rigid line of low-cost semi-rigid urethane casting resins cure quickly to semi-rigid plastics that offer exceptional strength and impact resistance.

New Formulations – New Look!
Smooth-Cast™ 45D
is newly reformulated with a translucent white appearance and improved physical properties. All Smooth-Cast semi rigids are now mercury free and phthalate free. These plastics are easy-to-use (mix ratio is 1A:1B by volume) and have low viscosities for minimal bubble entrapment. Vibrant colors are possible by adding SO-Strong™, UVO™ or Ignite™ colorants.

These semi-rigid plastics are good for making impact resistant prototypes, models, toys, props, climbing holds, etc. 

Click here for more Smooth-Cast™ resin products.

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