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LOCTITE ABLESTIK 104 Epoxy Adhesive for High-Temperature Electrical Assembly
LOCTITE ABLESTIK 104 Epoxy Adhesive for High-Temperature Assembly
LOCTITE ABLESTIK 104 Epoxy Adhesive is a two-component, heat-curing assembly adhesive developed for applications that demand electrical insulation, strong mechanical bonding, and reliable performance at very high operating temperatures. The system consists of a black liquid epoxy resin and a white anhydride hardener powder. After accurate weighing and thorough mixing, it creates a dense, electrically non-conductive bond for metals, glass, ceramics, and compatible thermoset plastics.
For electronics, industrial equipment, sensors, heating systems, and high-temperature assemblies, LOCTITE ABLESTIK 104 Epoxy Adhesive offers an effective alternative to general-purpose epoxies that may soften or lose strength during prolonged heat exposure. Henkel identifies a continuous operating range from approximately -25°C to 230°C, with tested short-term exposure up to 280°C. Its long working time also gives production teams flexibility when preparing larger batches or assembling complex components.
Key Benefits of LOCTITE ABLESTIK 104 Epoxy Adhesive
LOCTITE ABLESTIK 104 Epoxy Adhesive combines high-temperature resistance with excellent chemical resistance and strong adhesion. The recommended mixing ratio is 100 parts resin to 64 parts hardener by weight. At 25°C, the resin has a typical viscosity of about 25,000 mPa·s, while a 100 g mixed batch provides more than 12 hours of working time. This extended processing window supports careful mixing, coating, positioning, and fixture adjustment.
The cured material reaches a typical Shore D hardness of 90 and has a glass-transition temperature above 225°C. Henkel also reports volume resistivity of approximately 10¹⁵ ohm-cm and dielectric strength of about 15.7 kV/mm, supporting use in electrically insulating assemblies. Typical aluminum lap-shear strength is approximately 12.4 N/mm² at 25°C, 11.7 N/mm² at 150°C, and 9.7 N/mm² at 230°C.
Applications for LOCTITE ABLESTIK 104 Epoxy Adhesive
LOCTITE ABLESTIK 104 Epoxy Adhesive is suitable for bonding metal housings, ceramic components, glass parts, thermoset plastic structures, electrical insulators, high-temperature sensors, industrial heaters, and specialized electronic assemblies. It may also be considered for equipment exposed to fuels, oils, acids, alkalis, solvents, and other challenging chemicals when the complete application has been validated.
Because the adhesive is electrically non-conductive, it can protect electrical isolation while providing structural retention. Its high-temperature shear performance makes it especially useful where bonded components must remain secure during continuous thermal exposure. Manufacturers should still evaluate the actual substrate, surface finish, joint design, bond-line thickness, mechanical load, chemical exposure, and thermal cycle before approving the process.
How to Apply LOCTITE ABLESTIK 104 Epoxy Adhesive
Before applying LOCTITE ABLESTIK 104 Epoxy Adhesive, clean every bonding surface thoroughly to remove oxide, oil, dust, moisture, salts, and other contamination. Accurately weigh Part A and Part B at the recommended 100:64 ratio. Mix by hand with a kneading motion for two to three minutes while scraping the bottom and sides of the container, then power-mix gently for an additional two to three minutes when suitable.
Apply the uniform mixture to all bonding surfaces, assemble the parts, and use contact pressure or an appropriate fixture. Recommended cure options include six hours at 120°C, three hours at 150°C, two hours at 175°C, or one hour at 200°C. For optimum performance, Henkel recommends an additional post-cure of two to four hours at the highest expected service temperature.
Storage and Safety of LOCTITE ABLESTIK 104 Epoxy Adhesive
Store LOCTITE ABLESTIK 104 Epoxy Adhesive in tightly closed original containers in a clean, dry area, with 25°C identified as the optimal storage condition. Keep resin and hardener tools separate, avoid contamination, and never return dispensed material to the original package. Operators should use suitable ventilation and personal protective equipment and follow the latest safety data sheets for both components.
For buyers seeking an electrically insulating adhesive for severe thermal environments, LOCTITE ABLESTIK 104 Epoxy Adhesive provides long working time, high shear strength, chemical resistance, and dependable performance on metals, glass, ceramics, and thermoset plastics in demanding production environments where thermal stability and electrical isolation are essential. Explore our high-temperature epoxy adhesives for additional industrial assembly solutions.
