Brand Bondmaster Application Type Bond 1 Part or 2 Part 2 Part Material Form Liquid Substrate Glass, Alnico, Rigid Plastics, Steel, Epoxy-Coated Metal, Ferrite, Metals, Painted Metal Industry DC motors, Motors, Generators, Sensors, FlyWheels, Automotive, Electrical, Loud Speakers, Magnet Manufacturer Henkel Chemistry Acrylic Cure Method Moisture Cure Temperature (°C) 20 to 25, 20 to 25 Cure Time (min) Rapid, 60 Viscosity (cPs) 15,000 Color Blue, Gray Chemical Resistance Salt Spray High Temperature Resistance (°C) 155 Low Temperature Resistance (°C) -65
Technical Data for Henkel 581
Cure Temperature (°C) 20 to 25, 20 to 25 Cure Time (min) Rapid, 60 Viscosity (cPs) 15,000 Test Method Fixture or Handling Strength Time (min) 0.25 to 0.50 Test Method Work / Pot Time (min) >30 Test Method Mix Ratio 30:1 (by volume)
General Bond Strength (psi) Excellent Peel Strength (piw) 10 to 15 Test Method Shear Strength (psi) High, 3,000 to 3,500, 2,000, 250 Test Method Impact Strength (psi) High, 10 to 12 Test Method
Chemical Resistance Salt Spray High Temperature Resistance (°C) 155 Low Temperature Resistance (°C) -65
Specific Gravity 1.100 Flash Point (°F) >16,772.0 % Solids (%) 100
Shelf Life Details Shelf Life Test Method, Bondmaster 581 should be stored in a cool place, 0oC to 24oC (32oF to 75oF), and kept away from excessive heat, sparks, flame, and sunlight. When stored properly, the adhesive has a shelf life of six months. Refrigeration will extend the shelf life of the adhesive. Shelf Life (mon) 6, 6
Not Good For
Don't Use With Delrin, Polyethylene, Polyproplene, Polyurethane, Any type of elastomer, Acetal
Best Practices for Henkel 581
The 581 adhesive requires no surface preparation on most metal, ferrite, and glass surfaces. For optimum bond strength on metal parts, the surface should be washed with a solvent or cleansing solution, abraded with an abrasive pad, and then rinsed with a solvent or cleansing solution. Glass surfaces should be cleaned with a commercial glass cleaner before bonding. Painted surfaces should be abraded lightly and then wiped clean.
Apply Bondmaster 534 Activator by spraying, wiping, or brushing a thin film of the activator on one of the bonding surfaces.
Apply Bondmaster 581 Non-Corrosive Structural Adhesive to the bond area on the non-activated bonding surface.
Join the surfaces as soon as possible and apply sufficient pressure to maintain intimate contact between the parts until handling strength is obtained.
A 15 - 30 second clamp time is usually required for bonding of parts with minimal gap.
Bondmaster 581 should not be mixed with 534 Activator in large quantities, as a vigorous chemical reaction will occur generating a significant amount of heat and vapors.
Unreacted adhesive can be cleaned up using acetone, isopropanol, or MEK.
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Fixture or Handling Strength Time Test Methods
|Fixture or Handling Strength Time||Fixture-Handling Strength Time Temperature|
|0.25 to 0.50 min||25°C|
Viscosity Test Methods
|15,000 cPs||Viscosity, Brookfield, 25oC @ 20 rpm||25°C|
Work / Pot Time Test Methods
|Work / Pot Time||Test Method||Temperature|
|>30 min||The open time refers to the on-part life of the adhesive.||25°C|
Shear Strength Test Methods
|Shear Strength||Substrate||Test Method|
|3,000 to 3,500 psi||Steel/Steel||ASTM D1002|
|2,000 psi||Ferrite / Steel||ASTM D1002, Substrate failure|
|250 psi||Glass/Glass||ASTM D1002, Substrate failure|
Peel Strength Test Methods
|Peel Strength||Substrate||Test Method|
|10 to 15 piw||Steel/Steel||ASTM 1876|
Impact Strength Test Methods
|Impact Strength||Substrate||Test Method|
|10 to 12 psi||Steel/Steel||ASTM 950|