ARALDITE® AW 8621 / HARDENER HW 8621-3

ARALDITE® AW 8621 / HARDENER HW 8621-3 is a two-part, black system specifically formulated for bonding plastics, including polycarbonate, ABS, nylon, and Telene®, as well as painted metals. It is also used for potting automotive light socket connectors. It features excellent environmental and impact resistance.

RTU Product Type: 2K (2 component) Adhesive, Polyurethane (PU) Adhesive

Application Area: Automotive Light Socket Connector

Compatible Substrates & Surfaces: Acrylonitrile Butadiene Styrene (ABS), Fibre-reinforced Plastic (FRP), Metal, Nylon, Polycarbonate (PC), Sheet Molding Compound (SMC)

Chemical Family: Polyurethanes (PU)

Features: Excellent Toughness, Fast Setting, Good Environmental Resistance, High Strength, Impact Resistance, Resilient

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Enhanced TDS

Identification & Functionality

Features & Benefits

Ready-to-Use Product Features
Product Properties
  • Tough and resilient
  • Fast setting
  • Bonds a wide variety of materials

Applications & Uses

Application Area
Compatible Substrates & Surfaces
Applications

Adhesive for bonding a wide variety of materials including:

  • Telene®
  • ABS, polycarbonate and other plastics
  • SMC and FRP
  • Primed metals
  • Potting automotive light socket connectors

Properties

Physical Form

Technical Details & Test Data

Cured Properties

Cure Schedule 

Temperature Handling Strength(1)

Minimum Cure Time

77°F (25°C) 1 hour 12 hours
110°F (43°C) 30 minutes 8 hours
140°F (60°C) 15 minutes 1 hour

(1)Time to reach 200 psi lap shear strength

Physical Properties

Physical Properties

Unless otherwise stated, the data were determined with typical production batches using standard testing methods. They are provided solely as technical information and do not constitute a product specification.

Property Test Method Test Values Unit

Condition 

Shore Hardness ASTM D-2240 40D (85A) - -
Ultimate Tensile Strength ASTM D-638 2100 (14.5) psi (MPa) -
Elongation ASTM D-638 250 % -
Tg per DMA ASTM D-4065 122 (50) °F (°C) -
Coefficient of Thermal Expansion ASTM D-831 7.5 x 10⁵ in/in/°C -
Lap Shear Strength ASTM D-1002 2900 (20) psi (MPa) Tested on SMC
Effect of Substrate SAE J1525 980 (6.8) psi (MPa) Aluminum (2)
Effect of Substrate SAE J1525 520 (3.6) psi (MPa) Telene® (3)
Effect of Substrate SAE J1525 550 (3.8) psi (MPa) SMC
Effect of Test Temperature SAE J1525 525 (3.6) psi (MPa) -40°F (-40°C)
Effect of Test Temperature SAE J1525 65 (0.4) psi (MPa) 74°F (24°C)
Effect of Test Temperature SAE J1525 - psi (MPa) 180°F (82°C)
  • (2) Etched per ASTM D2651, Cured 12 hours at 77°F (25°C) followed by 30 minutes at 275°F (135°C)
  • (3) Abraded and solvent wiped

Storage & Handling

Storage Conditions
  • Araldite® AW 8621 resin / Hardener HW 8621-3 should be stored in a dry place, in the sealed original container, at temperatures between +5°C and +25°C ( +41°F and 77°F). Under these storage conditions, the shelf life is 1 year.
  • The product should not be exposed to direct sunlight. Keep containers closed to prevent moisture absorption and contamination.
  • These products are moisture sensitive and packaged under a blanket of dry nitrogen. If a container is opened, re-blanket with dry nitrogen and then tightly reseal.
  • If stored below 60°F, the adhesive should be brought to 60°F - 77°F and conditioned at this temperature for some time prior to use.

Other

Physical Properties
ValueUnitsTest Method / Conditions
Gel Time5.0-6.5 mmASTM D2471 at 25°C