EpoxAcast™ 655

EpoxAcast655pint ⓘ 10DE4F01-CA81-DF4B-8E14-A722E851AA59
Epoxy

Aluminum-filled epoxy casting resin for molds and patterns, with various working and cure times, depending on the hardener.

  • Shore hardness ~90 D
  • Thermal stability and dimensional accuracy
  • Working time: 30 min to 4 hrs, depending on the hardener.
  • Cures at room temperature
  • High compressive strength
health-hazard.svg corrosion.svg

Warning

H315 - Causes skin irritation.
H317 - May cause an allergic skin reaction.
H319 - Causes serious eye irritation.
H411 - Toxic to aquatic life with long lasting effects.
€ 61.23

(€ 50.60 without 21% VAT)

In stock

Description

This aluminum-filled epoxy tooling resin is designed for creating rigid molds, dies, fixtures, jigs, and master patterns. It is essential where strength, thermal stability, and dimensional accuracy are required. Once fully cured, it achieves a Shore hardness of approximately 90 D, resulting in a hard, impact-resistant surface suitable for machining, drilling, and polishing.

The resin is supplied as a base and can be used with various epoxy hardeners to adjust processing time. The working (pot) time ranges from about 30 minutes to 4 hours, depending on the chosen hardener (Fast, Medium, Slow, or High-Temperature). Cure time typically varies from 3 to 24 hours at room temperature, with optional post-cure cycles available to enhance heat resistance and mechanical properties.

Depending on project requirements, Part A Base can be mixed with 101 FAST, 102 MEDIUM, 103 SLOW or HT HIGH TEMP hardeners.

The aluminum filler provides excellent thermal conductivity, low shrinkage, and superior dimensional stability, making it suitable for vacuum forming tools, low-pressure injection molds, composite lay-up tools, and foundry patterns. It also offers high compressive strength, good abrasion resistance, and reliable performance in larger mass pours when proper mixing and temperature control are maintained.

Instructions

  • Mix the resin with the selected hardener per the specified ratio until uniform. 
  • Choose the hardener to adjust working time (30 min–4 hrs).
  • Available hardeners are: H101 (fast), H102 (medium), H103 (slow), HT (high temp)
  • Apply to clean, dry surfaces. 
  • Pour slowly to reduce air entrapment. 
  • Working time varies by hardener; do not disturb during cure. Initial cure occurs in 3–24 hours at room temperature. 
  • For best performance, apply the optional post-cure. 
  • Once cured (Shore D ~90), the material can be machined, drilled, or polished. 
  • Use gloves and ensure ventilation.

Specifications

Color Grey
Storage Temperature 73°F/23°C
Flexural Strength 7,660 psi
Flexural Modulus 1,403,000 psi
Shore D Hardness 90
Thermal Conductivity 0.675 W/(m*K)
Maximum Casting Volume 8,390 cm³
Maximum Heat Resistance 225°F/108°C
Mixed Viscosity (101, 102, 103 Hardener) 23,000 cps
Mixed Viscosity (HT Hardener) 12,000 cps
Specific Gravity (101, 102, 103 Hardener) 1.66 g/cc
Specific Gravity (HT Hardener) 1.64 g/cc
Specific Volume (101, 102, 103 Hardener) 16.7 cu. in./lb
Specific Volume (HT Hardener) 16.5 cu. in./lb
Ultimate Tensile Strength (101, 102, 103 Hardener) 4810 psi
Ultimate Tensile Strength (HT Hardener) 6,000 psi
Tensile Modulus (101, 102, 103 Hardener) 2,040,000 psi
Tensile Modulus (HT Hardener) 7,200,000 psi
Tensile Elongation (101, 102, 103 Hardener) 0.54%
Tensile Elongation (HT Hardener) 0.50%
Compressive Strength (101, 102, 103 Hardener) 12,500 psi
Compressive Strength (HT Hardener) 15,700 psi
Compressive Modulus (101, 102, 103 Hardener) 125,500 psi
Compressive Modulus (HT Hardener) 270,000 psi
Shrinkage (101, 102, 103 Hardener) 0.0006 in./in.
Shrinkage (HT Hardener) 0.001 in./in.
Heat Deflection Temperature (Room Temperature Cure) 135°F/57°C
Heat Deflection Temperature (Post Cured) 225°F/108°C
Available in Epoxy
Product Color Flexural Strength Flexural Modulus Specific Volume Specific Gravity Shrinkage Dielectric Strength Heat Deflection Temperature Volume Resistivity Compressive Strength Volume Resistance Tensile Elongation Tensile Modulus Compressive Modulus Mixed Viscosity Mixed Viscosity With HT Hardener Barcol Hardness Ultimate Tensile Strength Ultimate Tensile Strength With HT Hardener Tensile Modulus With HT Hardener Tensile Elongation With HT Hardener Flexural Strength With HT Hardener Flexural Modulus With HT Hardener Compressive Strength With HT Hardener Compressive Modulus With HT Hardener Shrinkage With HT Hardener Heat Deflection Temperature With HT Hardener Dielectric Constant At 60 Hz Dielectric Constant At 1 KHz Color With HT Hardener Storage Temperature Shore D Hardness Thermal Conductivity Maximum Casting Volume Maximum Heat Resistance Mixed Viscosity (101, 102, 103 Hardener) Mixed Viscosity (HT Hardener) Specific Gravity (101, 102, 103 Hardener) Specific Gravity (HT Hardener) Specific Volume (101, 102, 103 Hardener) Specific Volume (HT Hardener) Ultimate Tensile Strength (101, 102, 103 Hardener) Ultimate Tensile Strength (HT Hardener) Tensile Modulus (101, 102, 103 Hardener) Tensile Modulus (HT Hardener) Tensile Elongation (101, 102, 103 Hardener) Tensile Elongation (HT Hardener) Compressive Strength (101, 102, 103 Hardener) Compressive Strength (HT Hardener) Compressive Modulus (101, 102, 103 Hardener) Compressive Modulus (HT Hardener) Shrinkage (101, 102, 103 Hardener) Shrinkage (HT Hardener) Heat Deflection Temperature (Room Temperature Cure) Heat Deflection Temperature (Post Cured) Cure Time Specific Gravity Specific Volume Tensile Strength Tensile Modulus Compressive Strength Compressive Modulus Flexural Strength Shrinkage Heat Deflection Temp Tensile Elongation Flexural Modulus Mixed Viscocity Mix Ratio By Weight Pot Life Shore D Hardness Mixed Viscocity Cure Time Pot Life Mix Ratio By Weight Tensile Strength Heat Deflection Temp Refractive Index Refractive Index Ultimate Tensile Ultimate Tensile
EpoxAcast™ 650 Off-White 5,890 PSI 710,000 PSI 18.22 cu. in./lb 1.52 g/cc 0.001 in/in 404 V/mil 129°F / 54°C >3.59E+15 ohm cm 16,350 PSI >5.42E+11 ohm 0.42% 1,503,000 PSI 142,600 PSI 7,000 CPS 5,000 CPS 93.000000 6,000 PSI 6,900 PSI 1,079,000 PSI 0.82% 10,850 PSI 775,000 PSI 15,980 PSI 134,400 PSI 0.007 in/in 187°F / 86°C 5.300000 5.080000 Black - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
EpoxAcast™ 655 Grey 7,660 psi 1,403,000 psi - - - - - - - - - - - - - - - - - - - - - - - - - - - 73°F/23°C 90 0.675 W/(m*K) 8,390 cm³ 225°F/108°C 23,000 cps 12,000 cps 1.66 g/cc 1.64 g/cc 16.7 cu. in./lb 16.5 cu. in./lb 4810 psi 6,000 psi 2,040,000 psi 7,200,000 psi 0.54% 0.50% 12,500 psi 15,700 psi 125,500 psi 270,000 psi 0.0006 in./in. 0.001 in./in. 135°F/57°C 225°F/108°C - - - - - - - - - - - - - - - - - - - - - - - - - -
EpoxAcast™ 670 HT Beige 11,000 psi 254,000 psi 20.51 cu. in./lb. 1.15 g/cc 0.002 in. / in. - - - 13,000 psi - 0.65 % 332,000 psi 101,400 psi - - - - - - - - - - - - - - - - - 90 - - - - - - - - - - - - - - - - - - - - - - - <p>Twenty Four Hours Followed By Post Cure</p > 1.15 g/cc 20.51 cu. in./lb. 4,500 psi 332,000 psi 13,000 psi 101,400 psi 11,000 psi 0.002 in. / in. 350 °F 0.65 % 254,000 psi 6,000 cps 100A:16B 3 h. 90 6,000 cps <p>Twenty Four Hours Followed By Post Cure</p > 3 h. 100A:16B 4,500 psi 350 °F - - - -
EpoxAcast™ 690 Clear 10,980 psi 410,000 psi 25 cu. in./lb. 1.10 g/cc 0.002 in. / in. - - - 9,610 psi - 1.8 % 572,000 psi 91,300 psi - - - - - - - - - - - - - - - - - 80 - - - - - - - - - - - - - - - - - - - - - - - 24 h. 1.10 g/cc 25 cu. in./lb. 6,630 psi 572,000 psi 9,610 psi 91,300 psi 10,980 psi 0.002 in. / in. 115 °F 1.8 % 410,000 psi 280 cps 100A:30B 5 h. 80 280 cps 24 h. 5 h. 100A:30B 6,630 psi 115 °F 1.565 nm 1.565 nm - -
EpoxAcast™ 692 Deep Pour Clear 6,780 psi 203,000 psi 25.7 cu. in./lb. 1.08 g/cc 0.007 in. / in. - - - 5,777 psi - 3.1 % 378,000 psi 82,000 psi - - - - - - - - - - - - - - - - - 80 - - - - - - - - - - - - - - - - - - - - - - - - 1.08 g/cc 25.7 cu. in./lb. - 378,000 psi 5,777 psi 82,000 psi 6,780 psi 0.007 in. / in. 100 °F 3.1 % 203,000 psi 370 cps 100A:40B 12 h. 80 370 cps - 12 h. 100A:40B - 100 °F 1.5372 nm 1.5372 nm 4,585 psi 4,585 psi
EpoxAcast™ Hardener - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

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