• Description for 3M DP640

    Brown is a two-part, non-sag/thixotropic urethane adhesives. It provides tough, flexible bonds with good adhesion to a wide variety of substrates.

    *See Terms of Use Below

    Application Type Bond
    1 Part or 2 Part 2 Part
    Material Form Liquid
    Substrate Aluminum, Glass, Painted metals, Many properly abraded and cleaned plastics, Polycarbonate, PVC, EPDM, Cold rolled Steel, Wood, FRP, Ceramics, Nylon, Acrylic, Etched Aluminum, Rigid PVC, Rubber, Steel, Primed Aluminum, SBR
    Manufacturer 3M
    Chemistry Isocyanate, Polyol, Polyurethane, Urethane
    Cure Method Base/Accelerator
    Cure Temperature (°C) 23
    Cure Time (min) 10,080
    Viscosity (cPs) Non-sag, <25,000
    Color Brown
    Chemical Resistance 1, 1, 1-Trichlorethane, Acetone, Freon TF, Freon TMC, Isopropyl Alcohol, RMA Flux, Solvent
    Density (g/cm³) 10.1 to 10.5 (weight (lbs/gal)), 11.1 to 11.5 (weight (lbs/gal))
  • Technical Data

    Overview
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    Specifications
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  • Best Practices

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Cure Temperature Test Methods
Cure Temperature Cure Time Test Method
23°C The cure time is defined as the time required for the adhesive to achieve a minimum of 80% of its ultimate OLS on aluminum.
Cure Time Test Methods
Cure Time Test Method
10,080 min The cure time is defined as the time required for the adhesive to achieve a minimum of 80% of its ultimate OLS on aluminum.
Fixture or Handling Strength Time Test Methods
Fixture or Handling Strength Time Fixture-Handling Strength Test Method Fixture-Handling Strength Time Temperature
360 to 480 min Handling strength determined per test method C-3179. Time to handling strength taken to be that required to achieve a 50 psi overlap shear OLS strength using aluminum substrates. 23°C
Viscosity Test Methods
Viscosity Temperature
Non-sag
<25,000 cPs 24°C
Work / Pot Time Test Methods
Work / Pot Time Test Method Temperature
5.00 to 40 min
Long
40 min 10 g, 1/4" thick, @ 77°F (25°C) 23°C
Shear Strength Test Methods
Shear Strength Type Cure Time Cure Temperature Substrate Test Time Test Temperature Test Method
2,000 psi Overlap Shear Strength 10,080 min 23°C CRS/CRS 23°C Overlap shear bonds were tested on 1" wide test specimens with a 1/2" overlap of the adhesive bonded area. Substrates were bonded after surfaces were prepared according to the surface preparation section. They were cured for 1 week at 73°F (23°C) prior to testing. Tests were run according to Test Method ASTM D1002-72.
300 psi Overlap Shear Strength 10,080 min 23°C CRS/CRS 82°C Overlap shear bonds were tested on 1" wide test specimens with a 1/2" overlap of the adhesive bonded area. Substrates were bonded after surfaces were prepared according to the surface preparation section. They were cured for 1 week at 73°F (23°C) prior to testing. Tests were run according to Test Method ASTM D1002-72.
2,000 psi Overlap Shear Strength 10,080 min 23°C Al/Al 23°C Overlap shear bonds were tested on 1" wide test specimens with a 1/2" overlap of the adhesive bonded area. Substrates were bonded after surfaces were prepared according to the surface preparation section. They were cured for 1 week at 73°F (23°C) prior to testing. Tests were run according to Test Method ASTM D1002-72.
1,850 psi Overlap Shear Strength 10,080 min 23°C SBR/Wood 23°C Overlap shear bonds were tested on 1" wide test specimens with a 1/2" overlap of the adhesive bonded area. Substrates were bonded after surfaces were prepared according to the surface preparation section. They were cured for 1 week at 73°F (23°C) prior to testing. Tests were run according to Test Method ASTM D1002-72.
950 psi Overlap Shear Strength 10,080 min 23°C PC/PC 23°C Substrate Failure, Overlap shear bonds were tested on 1" wide test specimens with a 1/2" overlap of the adhesive bonded area. Substrates were bonded after surfaces were prepared according to the surface preparation section. They were cured for 1 week at 73°F (23°C) prior to testing. Tests were run according to Test Method ASTM D1002-72.
1,150 psi Overlap Shear Strength 10,080 min 23°C PVC/PVC 23°C Substrate Failure, Overlap shear bonds were tested on 1" wide test specimens with a 1/2" overlap of the adhesive bonded area. Substrates were bonded after surfaces were prepared according to the surface preparation section. They were cured for 1 week at 73°F (23°C) prior to testing. Tests were run according to Test Method ASTM D1002-72.
3,300 psi Overlap Shear Strength Aluminum -40°C ASTM D1002
2,160 psi Overlap Shear Strength Aluminum 23°C ASTM D1002
450 psi Overlap Shear Strength Aluminum 900 sec 82°C ASTM D1002
2,160 psi Overlap Shear Strength Aluminum 23°C (ASTM D1002), MEK/abrade/MEK
1,960 psi Overlap Shear Strength Cold Rolled Steel 23°C (ASTM D1002), MEK/abrade/MEK
740 psi Overlap Shear Strength Nylon 23°C (ASTM D1002), IPA/abrade/IPA
1,210 psi Overlap Shear Strength Polycarbonate 23°C (ASTM D1002), IPA/abrade/IPA
1,180 psi Overlap Shear Strength SMC 23°C (ASTM D1002), IPA/abrade/IPA
1,160 psi Overlap Shear Strength ABS 23°C (ASTM D1002), IPA/abrade/IPA
460 psi Overlap Shear Strength HIPS 23°C (ASTM D1002), IPA/abrade/IPA
Peel Strength Test Methods
Peel Strength Type Substrate Test Temperature Test Method
64 piw Floating Roller Peel Aluminum 23°C ASTM D3167
Chemical Resistance Test Methods
Chemical Resistance Test Method
1, 1, 1-Trichlorethane Solvent resistance was determined using cured (24 hrs RT + 2 hrs 160°F [71°C]) samples (1/2 in. x 4 in. x 1/8 in. thickness) immersed in the test solvent for 1 hour and 1 month. After the allowed period of time, the sample was removed and visually examined for surface attack as compared to the control.
Acetone
Freon TF
Freon TMC
Isopropyl Alcohol
RMA Flux
Solvent
Dielectric Constant Test Methods
Dielectric Constant Temperature Test Method
5.90 23°C ASTM D 150, @ 1 KHz @ 23°C
Dielectric Strength Test Methods
Dielectric Strength Test Method
470 V/mil ASTM D 149
Dissipation Factor Test Methods
Dissipation Factor Temperature Test Method
0.12000 23°C ASTM D 150, @ 1 KHz @ 23°C
Volume Resistivity Test Methods
Volume Resistivity Test Method
2.6e12 (ohms/cm) ASTM D 257
Elongation Test Methods
Elongation Test Method
100 % Elongation is determined using 3M test method C-3094/ASTM D 882.
Shore D Hardness Test Methods
Shore D Hardness Shore Hardness Test Method
50 to 60 ASTM D 2240