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Castable Epoxies
Castable Epoxies
Castable epoxies are used for a variety of industrial applications. They are easy to use,
contain no VOC’s and are solvent free. Compared to Smooth-Cast® or TASK® urethane
plastics, EpoxAcast® epoxies are generally harder, have higher compression strength
as well as higher heat and abrasion resistance. They are also widely used for electrical
encapsulation and bonding applications.
EpoxAcast® 650 is a mineral filled general
purpose casting epoxy that is low cost and versatile.
It features a low mixed viscosity for minimal bubble
entrapment. Choose Fast, Medium or Slow catalyst to fit
your project. You can also use HT Hardener to give your EpoxAcast® 650
castings higher heat resistance. EpoxAcast® 650 is used for is used for
making hard dies for metal stamping as well as patterns and encapsulating
fixtures. It is also used for electrical encapsulation to extend sensitive
the life cycles and enhance the performance of potted electronics.
electronic devices. Available in off-white and black.
EpoxAcast® 650’s high compressive strength makes it ideal for making stamping dies
that withstand 20 tons of pressure for production pressing of copper metal ornaments.
EpoxAcast® 655 is an aluminum filled
casting epoxy that is dimensionally stable even
when mass cast. It is thermally conductive and fully
machineable when cured. Choose Fast, Medium
or Slow catalyst to fit your project. You can
also use HT Hardener to give your castings
higher heat resistance. EpoxAcast® 655
is used for making vacuum forming
dies, injection molds, foundry EpoxAcast® 655
patterns and tooling fixtures. is commonly used for
vacuum forming dies.
EpoxAcast® 670 HT High Temp Castable Epoxy
EpoxAcast® 670 HT offers exceptional high temperature resistance
to 350°F / 177°C and low shrinkage. It is used for making high
temp resistant industrial parts and tooling, high-speed hard rollers,
prototype injection molds, vacuum forming dies and fixtures.
EpoxAcast® 670 is used to make prototype high heat injection molds.
EpoxAcast® 690 Clear is a UV resistant clear casting
epoxy that is ideal for making clear jewelry/beads
or replacement lenses for kit cars, etc. Color with UV
SO-Strong® or UVO® colorants. Also suitable for Resistant!
making clear molds and prototype parts.
EpoxAcast® 690 is perfect Optically clear lens for
for resin jewelry craft. projector prototype.
A:B Mix Ratio Mixed Viscosity Pot Life Demold Time Hardness (Shore D) (Barcol B) Shrinkage (in./in.) Specific Volume (cu. in./lb.) Ultimate Tensile Compressive Strength Color
Product Name
EpoxAcast® 650 Fast* 100A:12B pbw 7,000 cps 20 min. 1 hr. 93B .001 18.2 6,000 psi 16,350 psi Off-White/Black
EpoxAcast® 655 Fast* 100A:10B pbw 23,000 cps 30 min. 3 hrs. 90D .0006 16.7 4,810 psi 12,500 psi Grey
EpoxAcast® 670 HT 100A:16B pbw 6,000 cps 3 hrs. 24 hrs. 90D .002 20.5 4,500 psi 13,000 psi Beige
EpoxAcast® 690 Clear 100A:30B pbw 200 cps 5 hrs. 24 hrs. 80D .002 25.0 6,630 psi 9,610 psi Clear
Values are mass and configuration dependant. *Also compatible with Medium and Slow speed catalyst
37 Learn more at: www.smooth-on.com
Castable Epoxies
Castable epoxies are used for a variety of industrial applications. They are easy to use,
contain no VOC’s and are solvent free. Compared to Smooth-Cast® or TASK® urethane
plastics, EpoxAcast® epoxies are generally harder, have higher compression strength
as well as higher heat and abrasion resistance. They are also widely used for electrical
encapsulation and bonding applications.
EpoxAcast® 650 is a mineral filled general
purpose casting epoxy that is low cost and versatile.
It features a low mixed viscosity for minimal bubble
entrapment. Choose Fast, Medium or Slow catalyst to fit
your project. You can also use HT Hardener to give your EpoxAcast® 650
castings higher heat resistance. EpoxAcast® 650 is used for is used for
making hard dies for metal stamping as well as patterns and encapsulating
fixtures. It is also used for electrical encapsulation to extend sensitive
the life cycles and enhance the performance of potted electronics.
electronic devices. Available in off-white and black.
EpoxAcast® 650’s high compressive strength makes it ideal for making stamping dies
that withstand 20 tons of pressure for production pressing of copper metal ornaments.
EpoxAcast® 655 is an aluminum filled
casting epoxy that is dimensionally stable even
when mass cast. It is thermally conductive and fully
machineable when cured. Choose Fast, Medium
or Slow catalyst to fit your project. You can
also use HT Hardener to give your castings
higher heat resistance. EpoxAcast® 655
is used for making vacuum forming
dies, injection molds, foundry EpoxAcast® 655
patterns and tooling fixtures. is commonly used for
vacuum forming dies.
EpoxAcast® 670 HT High Temp Castable Epoxy
EpoxAcast® 670 HT offers exceptional high temperature resistance
to 350°F / 177°C and low shrinkage. It is used for making high
temp resistant industrial parts and tooling, high-speed hard rollers,
prototype injection molds, vacuum forming dies and fixtures.
EpoxAcast® 670 is used to make prototype high heat injection molds.
EpoxAcast® 690 Clear is a UV resistant clear casting
epoxy that is ideal for making clear jewelry/beads
or replacement lenses for kit cars, etc. Color with UV
SO-Strong® or UVO® colorants. Also suitable for Resistant!
making clear molds and prototype parts.
EpoxAcast® 690 is perfect Optically clear lens for
for resin jewelry craft. projector prototype.
A:B Mix Ratio Mixed Viscosity Pot Life Demold Time Hardness (Shore D) (Barcol B) Shrinkage (in./in.) Specific Volume (cu. in./lb.) Ultimate Tensile Compressive Strength Color
Product Name
EpoxAcast® 650 Fast* 100A:12B pbw 7,000 cps 20 min. 1 hr. 93B .001 18.2 6,000 psi 16,350 psi Off-White/Black
EpoxAcast® 655 Fast* 100A:10B pbw 23,000 cps 30 min. 3 hrs. 90D .0006 16.7 4,810 psi 12,500 psi Grey
EpoxAcast® 670 HT 100A:16B pbw 6,000 cps 3 hrs. 24 hrs. 90D .002 20.5 4,500 psi 13,000 psi Beige
EpoxAcast® 690 Clear 100A:30B pbw 200 cps 5 hrs. 24 hrs. 80D .002 25.0 6,630 psi 9,610 psi Clear
Values are mass and configuration dependant. *Also compatible with Medium and Slow speed catalyst
37 Learn more at: www.smooth-on.com
