Henkel 661

Henkel 661 Datasheet
  • Description for Henkel 661

    A two-part, rapid, room temperature cure, toughened acrylic adhesive that combines ease of use with a high level of performance. The cured adhesive provides a combination of high shear and impact strength with excellent durability.

    *See Terms of Use Below

    Brand Bondmaster
    Application Type Bond
    1 Part or 2 Part 2 Part
    Material Form Liquid
    Substrate Acrylic, Aluminum, Ferrite, Glass, Metals, ABS, Polycarbonate, PVC, Steel, Stainless Steel, Neodymium iron boron, Zinc Dichromate, Phenolic, Galvanized Steel, Galvanized Steel, Alnico, Rigid Plastics, Zinc plated Steel, Zinc Plated, Epoxy-Coated Metal, Zinc plated Steel, Painted Metal, Samarian cobalt
    Industry DC motors, Automotive, Marine, Electrical, Magnet, Speakers, Generators
    Manufacturer Henkel
    Chemistry Acrylic, Toughened
    Cure Method Part A/Part B
    Cure Temperature (°C) 20 to 25, 20 to 25
    Cure Time (min) Rapid, 60
    Viscosity (cPs) 8,500
    Color Dark Green
    Chemical Resistance Acetone, Diesel Fuel, Gasoline, Isopropyl Alcohol, Salt Spray
    High Temperature Resistance (°C) 155
    Low Temperature Resistance (°C) -65
    Durability Excellent Durability
  • Technical Data

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  • Best Practices

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Fixture or Handling Strength Time Test Methods
Fixture or Handling Strength Time Fixture-Handling Strength Time Temperature
0.75 to 1.50 min 25°C
Viscosity Test Methods
Viscosity Test Method Temperature
8,500 cPs Viscosity, Brookfield, 25oC 77°F @ 20 rpm 25°C
Work / Pot Time Test Methods
Work / Pot Time Temperature
0.50 min 25°C
Impact Strength Test Methods
Impact Strength Substrate Test Method
8 to 10 (ft-lb / in2) Steel/Steel ASTM 950
Peel Strength Test Methods
Peel Strength Type Substrate Test Method
10 to 20 (pli) T-Peel strength Steel/Steel ASTM 1876
Shear Strength Test Methods
Shear Strength Type Substrate Test Temperature Test Method
2,500 to 3,000 psi Lap shear strength Steel/Steel 25°C ASTM D-1002
2,000 to 2,800 psi Lap shear strength Aluminum/Aluminum 25°C ASTM D-1002
1,500 to 2,500 psi Lap shear strength Galvanized steel/Galvanized steel 25°C ASTM D-1002
2,500 to 3,000 psi Lap shear strength Stainless Steel/Stainless Steel 25°C ASTM D-1002
2,000 to 2,800 psi Lap shear strength Zinc plated steel/Zinc plated steel 25°C ASTM D1002
2,000 psi Lap shear strength Ferrite/Steel 25°C ASTM D-1002, Substrate Failure
2,000 psi Lap shear strength Ferrite/Zinc Dichromate 25°C ASTM D-1002, Substrate Failure
2,000 psi Lap shear strength Ferrite/Galvanized Steel 25°C ASTM D-1002, Substrate Failure
2,000 psi Lap shear strength Ferrite/Zinc plated 25°C ASTM D-1002, Substrate Failure
250 psi Lap shear strength Glass/Glass 25°C ASTM D1002, Substrate Failure
300 to 400 psi Lap shear strength Phenolic/Phenolic 25°C ASTM D1002
300 to 400 psi Lap shear strength PVC/PVC 25°C ASTM D1002
50 to 100 psi Lap shear strength Polycarbonate/Polycarbonate 25°C ASTM D1002
80 to 120 psi Lap shear strength ABS/ABS 25°C ASTM D1002
200 to 300 psi Lap shear strength Acrylic/Acrylic 25°C ASTM D1002
Shore D Hardness Test Methods
Shore D Hardness Hardness Temperature
60 to 65 25°C
55 to 60 50°C
40 to 45 100°C