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Description for Henkel Armstrong A-12 Epoxy Resin 2:3
A general purpose adhesive, combines low toxicity with good physical properties. This two-part adhesive has a non-critical mixing ratio with 1:1 used most frequently. The mix ratio can be varied to obtain a more flexible or more rigid bond by increasing or decreasing respectively, the concentration of Part B.Brand Loctite, Armstrong Application Type Bond 1 Part or 2 Part 2 Part Material Form Liquid Substrate Al, Ceramic, Metal, Plastics, Wood Manufacturer Henkel Chemistry Epoxy Cure Method 2-Part Cure Cure Temperature (°C) 74 Cure Time (min) 120 Viscosity (cPs) 80,000 High Temperature Resistance (°C) 82 Low Temperature Resistance (°C) -51 -
Best Practices for Henkel Armstrong A-12 Epoxy Resin 2:3
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Surface Preparation
The surfaces to be bonded should be clean and dry (for critical applications refer to our suggested surface preparation procedures - Bulletin No. 964)
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Application
Apply the adhesive to surfaces to be bonded (preferably both surfaces) and press together. Light clamping may be used to keep parts in position during curing.
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Mixing
Thoroughly mix the A-12 Part B with the A-12 part A in a clean discardable container using correct mix ratio. Avoid the introduction of excess air.
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Cure Temperature Test Methods
Cure Temperature | Cure Time Test Method |
---|---|
74°C | Optimum cure |
Cure Time Test Methods
Cure Time | Test Method |
---|---|
120 min | Optimum cure |
Work / Pot Time Test Methods
Work / Pot Time | Test Method | Temperature |
---|---|---|
120 min | 100 gms @77°F | 25°C |
60 min | 1# @ 77°F | 25°C |
Cleavage Strength Test Methods
Cleavage Strength | Cure Time | Cure Temperature |
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General Bond Strength Test Methods
General Bond Strength | Cure Time | Cure Temperature |
---|---|---|
1,800 psi | 120 min | 165°C |
Tensile Strength Test Methods
Tensile Strength | Type | Cure Time | Cure Temperature | Substrate |
---|---|---|---|---|
2,900 psi | 120 min | 74°C |
Shear Strength Test Methods
Shear Strength | Type | Cure Time | Cure Temperature | Substrate | Test Temperature |
---|---|---|---|---|---|
4,000 psi | Tensile Shear Strength | 120 min | 74°C | al/al | 25°C |
500 psi | Tensile Shear Strength | 120 min | 74°C | al/al | 82°C |
3,000 psi | Tensile Shear Strength | 120 min | 74°C | al/al | -51°C |
Specific Gravity Test Methods
Specific Gravity | Temperature |
---|---|
1.330 | 25°C |

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