• Description for Henkel Armstrong A-31 Epoxy Resin

    A two-part, room temperature curing, epoxy resin formulation for general purpose applications. Features low out-gassing characteristics which makes it quite suitable for bonding of vacuum devices. Resistant to thermal changes for outdoor applications and for the bonding of dissimilar adherents.

    *See Terms of Use Below

    Brand Armstrong
    Application Type Bond, Seal
    1 Part or 2 Part 2 Part
    Material Form Paste
    Substrate Metal, Olefin Plastics, Dissimilar adherents, Plastics, Dissimilar materials, Teflon
    Manufacturer Henkel
    Chemistry Epoxy
    Cure Method Part A/Part B
    Cure Temperature (°C) 20 to 25, 24, 74
    Cure Time (min) 960 to 1,200, 120
    Color Neutral
    Chemical Resistance 10% NaCl, Acetone, Distilled H20, Ethylacetate, Ethylene dichloride, Glacial acetic acid, Hexane, NH4 OH, Toluene
  • Technical Data

    Overview
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    Specifications
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  • Best Practices

    *See Terms of Use Below

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Work / Pot Time Test Methods
Work / Pot Time Test Method Temperature
40 to 50 min A mixture of 100 grams will have a usable pot life of 40 to 50 minutes at 75° F. 24°C
Shear Strength Test Methods
Shear Strength Type Cure Time Cure Temperature Cure Humidity Chemical Test Time Test Temperature
2,350 psi Tensile Shear Strength 20 to 25°C Room Temperature 25°C Room Temperature
2,450 psi Tensile Shear Strength 20 to 25°C Room Temperature -51°C
1,590 psi Tensile Shear Strength 20 to 25°C Room Temperature 82°C
2,160 psi Tensile Shear Strength 20 to 25°C Room Temperature NH4 OH 604,800 sec
2,360 psi Tensile Shear Strength 20 to 25°C Room Temperature Distilled H2O 604,800 sec
1,980 psi Tensile Shear Strength 20 to 25°C Room Temperature Glacial Acetic acid 604,800 sec
2,280 psi Tensile Shear Strength 20 to 25°C Room Temperature 10% NaCI 604,800 sec
2,120 psi Tensile Shear Strength 20 to 25°C Room Temperature Acetone 604,800 sec
2,290 psi Tensile Shear Strength 20 to 25°C Room Temperature Ethylene dichloride 604,800 sec
2,150 psi Tensile Shear Strength 20 to 25°C Room Temperature Toluene 604,800 sec
2,490 psi Tensile Shear Strength 20 to 25°C Room Temperature Ethylacetate 604,800 sec
2,370 psi Tensile Shear Strength 20 to 25°C Room Temperature Hexane 604,800 sec
2,530 psi Tensile Shear Strength 20 to 25°C Room Temperature 100 % 604,800 sec
2,460 psi Tensile Shear Strength 120 min 74°C 25°C Room Temperature
2,800 psi Tensile Shear Strength 120 min 74°C -51°C
2,350 psi Tensile Shear Strength 120 min 74°C 82°C
2,430 psi Tensile Shear Strength 120 min 74°C NH4 OH 604,800 sec
2,470 psi Tensile Shear Strength 120 min 74°C Distilled H2O 604,800 sec
2,260 psi Tensile Shear Strength 120 min 74°C Glacial Acetic acid 604,800 sec
2,460 psi Tensile Shear Strength 120 min 74°C 10% NaCI 604,800 sec
2,290 psi Tensile Shear Strength 120 min 74°C Acetone 604,800 sec
2,330 psi Tensile Shear Strength 120 min 74°C Ethylene dichloride 604,800 sec
2,250 psi Tensile Shear Strength 120 min 74°C Toluene 604,800 sec
2,490 psi Tensile Shear Strength 120 min 74°C Ethylacetate 604,800 sec
2,340 psi Tensile Shear Strength 120 min 74°C Hexane 604,800 sec
2,620 psi Tensile Shear Strength 120 min 74°C 100 % 604,800 sec
Tensile Strength Test Methods
Tensile Strength Cure Time Cure Temperature Chemical Test Time Test Temperature
5,350 psi 20 to 25°C Room Temperature
3,960 psi 120 min 74°C
Cleavage Strength Test Methods
Cleavage Strength Cure Time Cure Temperature
1,490 psi 20 to 25°C Room Temperature
1,720 psi 0.00 min 74°C
General Bond Strength Test Methods
General Bond Strength Cure Time Cure Temperature
1,980 psi 25°C
2,000 psi 120 min 74°C
Elongation Test Methods
Elongation Test Method
2 %
2 % 2 hrs @ 165°F
Coefficient of Thermal Expansion (CTE) Test Methods
Coefficient of Thermal Expansion (CTE) CTE Test Method
3.8e-5 (in./ in/°C)
3.7e-5 (in./ in/°C) 2 hrs @ 165°F