Henkel Armstrong A-31 Datasheet Henkel Armstrong A-31

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  • Description for Henkel Armstrong A-31

    A two-part, room temperature curing, epoxy resin formulation for general purpose applications, thixotropic with a creamy or buttery consistency.

    *See Terms of Use Below

    Brand Loctite, Armstrong
    Chemical Resistance 10% NaCl, Chemical Resistance: Glacial acetic acid, Acetone, Distilled H20, Ethylacetate, Ethylene dichloride, Toluene, Hexane, NH4 OH
    Application Type Bond, Seal
    1 Part or 2 Part 2-Part
    Material Form Paste
    Substrate All metals, Olefin plastics, Dissimilar adherents, Hard plastics, Dissimilar materials, Treated Teflon
    Industry General purpose applications
    Manufacturer Henkel
    Chemistry Epoxy resin
    Cure Method 2-Part Cure, Room temperature curing
    Cure Temperature (°C) 20 to 25 Room temperature, 24, 74
    Cure Time (min) 960 to 1,200, 120
    Viscosity (cPs) Creamy, Buttery
    Color Neutral
    High Temperature Resistance (°C) Quite resistant to thermal changes

  • Technical Data for Henkel Armstrong A-31

    *See Terms of Use Below

    Overview
    • Chemical Resistance
      • Chemical Resistance - 10% NaCl, Acetone, Distilled H20, Ethylacetate, Ethylene dichloride, Hexane, NH4 OH, Toluene
      • Chemical Resistance : Acid Resistance - Glacial acetic acid
    • Application Type
    • 1 Part or 2 Part
      • 2-Part
    • Material Form
      • Paste
    • Substrate
      • Dissimilar Substrates - Dissimilar adherents, Dissimilar materials
      • Metal - All metals
      • Plastic - Olefin plastics, Hard plastics, Treated Teflon
    • Industry
      • General Purpose - General purpose applications
      • Other - Vacuum devices, Outdoor applications, Outdoor applications
    • Chemistry
    • Cure Method
      • Room Temperature / Air Dry - Room temperature curing
      • 2-Part Cure
    • Color
      • Other - Neutral
    • Brand
      • Armstrong
      • Loctite
    Specifications
    Cure Specs
    Cure Temperature (°C) 20 to 25 Room temperature, 24, 74
    Cure Time (min) 960 to 1,200, 120
    Viscosity (cPs) Creamy, Buttery
    Work / Pot Time (min) 40 to 50 Test Method
    Thixotropic Thixotropic
    Mix Ratio 3:2 (by weight), 2:1 (by volume)
    Bond Strength
    General Bond Strength (psi) 1,980, 2,000 Test Method
    Shear Strength (psi) 2,350, 2,450, 1,590, 2,160, 2,360, 1,980, 2,280, 2,120, 2,290, 2,150, 2,490, 2,370, 2,530, 2,460, 2,800, 2,350, 2,430, 2,470, 2,260, 2,460, 2,290, 2,330, 2,250, 2,490, 2,340, 2,620 Test Method
    Cleavage Strength (psi) 1,490, 1,720 Test Method
    Tensile Strength (psi) 5,350, 3,960 Test Method
    Material Resistance
    Environmental Resistance Environmental resistance
    High Temperature Resistance (°C) Quite resistant to thermal changes
    Moisture/Humidity Resistance Moisture/humidity resistance
    Hardness
    Elongation (%) 2, 2 Test Method
    Other Properties
    Outgassing Low
    Coefficient of Thermal Expansion (CTE) 3.8e-5 (in./ in/°C), 3.7e-5 (in./ in/°C) Test Method
    Business Information
    Shelf Life Details Store below 25°C out of sunlight and in original unopened containers. Refer to packaging specific quote for shelf life information.
    Shelf Life Temperature (°F) <77

  • Best Practices for Henkel Armstrong A-31

    *See Terms of Use Below

    1. Application

      Easy to work and apply

    2. Mixing

      Mix three parts A-31 Part A with two part A-31 part B by weight, or two parts Part A with one part B by volume.

    3. Curing

      At room temperature 70% to 80% of the ultimate strength is attained within 16 to 20 hours (75°F). For faster cure, subject glue line to temperature of 165°F for two hours. Maximum chemical, moisture and heat resistance properties are obtained with a heat cure.

  • Comparable Materials for Henkel Armstrong A-31

    *See Terms of Use Below

    Spec Engine® Results

    • Henkel
      Loctite Ablestik 2902(Henkel)

      ● Two components ● Electrically conductive ● Thermally conductive ● Solvent-free ● High adhesion ● Room temperature cure ● Good adhesion to a variety of substrates

    • Devcon (ITW)
      Underwater Repair Putty (UW)(Devcon (ITW))

      Makes (effective) repairs to metal, concrete, wood surfaces in wet and dry environments.

    • Epoxy Technology
      Epo-Tek H22(Epoxy Technology)

      A two part component is silver-filled epoxy system designed specifically for die bonding and sealing hybrid circuit packages and it has outstanding high temperature properties and excellent solvent, chemical and moisture resistance.

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