• Description for 3M 2158 B/A

    Long worklife rigid epoxy • 8-12 hrs. handling strength • General purpose

    *See Terms of Use Below

    Application Type Bond
    1 Part or 2 Part 2 Part
    Material Form Liquid
    Substrate Aluminum FPL Etch, Glass, Metal, Plastic, Rubber, Steel, Wood, Concrete
    Manufacturer 3M
    Chemistry Epoxy, Synthetic Resin, Modified Epoxy
    Cure Method Base/Accelerator
    Cure Temperature (°C) 20 to 25 Room Temperature, 24, 24, 49, 93
    Cure Time (min) 10,080, 10,080, 120, 30
    Viscosity (cPs) 375,000
    Color Gray
    Chemical Resistance Air, Salt spray, Tap Water
    High Temperature Resistance (°C) 82
    Low Temperature Resistance (°C) -55
    Other Resistance Aging resistance
    Density (g/cm³) 12.8 to 13.2 (weight (lbs/gal)), 12.4 to 13.2 (weight (lbs/gal))
  • Technical Data

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  • Best Practices

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Cure Temperature Test Methods
Cure Temperature Cure Time Test Method
20 to 25°C Room Temperature
Cure Time Test Methods
Cure Time Test Method
10,080 min
10,080 min
120 min
30 min
Fixture or Handling Strength Time Test Methods
Fixture or Handling Strength Time Fixture-Handling Strength Test Method Fixture-Handling Strength Time Temperature
480 to 720 min Cured 24°C
Viscosity Test Methods
Viscosity Temperature
375,000 cPs 24°C
Work / Pot Time Test Methods
Work / Pot Time Test Method Temperature
120 min Approximate time for a 100 gram quantity @ 75°F [24°C] 24°C
Shear Strength Test Methods
Shear Strength Type Substrate Test Temperature Test Method
1,500 psi Overlap shear strength Aluminum FPL Etch -55°C ASTM D-1002-72
2,000 psi Overlap shear strength Aluminum FPL Etch 24°C ASTM D-1002-72
400 psi Overlap shear strength Aluminum FPL Etch 82°C ASTM D-1002-72
Peel Strength Test Methods
Peel Strength Type Substrate Test Temperature Test Method
3 piw T-Peel Strength Aluminum FPL Etch 24°C ASTM D-1876-61T
Dielectric Constant Test Methods
Dielectric Constant Temperature Test Method
5.60 23°C Dielectric constant, 1 KHz, Cured
Dielectric Strength Test Methods
Dielectric Strength Test Method
980 V/mil Cured
Dissipation Factor Test Methods
Dissipation Factor Temperature Test Method
0.01900 23°C Dissipation Factor, 1 KHz, Cured
Volume Resistivity Test Methods
Volume Resistivity Test Method
1.4e15 (ohms/cm) Cured
Shore D Hardness Test Methods
Shore D Hardness Shore Hardness Test Method
85 ASTM D-2240
Coefficient of Thermal Expansion (CTE) Test Methods
Coefficient of Thermal Expansion (CTE) CTE Temperature (°C)
53e-6 (in./ in/°C) -50 to 30°C
135e-6 (in./ in/°C) 70 to 130°C