ARALDITE® AW4858/Hardener HW4858 is a two-component, room-temperature curing epoxy adhesive paste in black color, known for its high strength and toughness. It is specifically engineered for bonding a wide range of materials, including metals and composites, with performance enhancements achievable through elevated-temperature post-curing. The system consists of resin (AW4858) and hardener (HW4858), forming a thixotropic mixture upon blending for ease of application.

This section deepens the parameters from the first part, highlighting unique performance advantages. The high viscosity (20-30 Pa.s for AW4858) ensures the adhesive does not sag on vertical surfaces, while its thixotropic nature allows it to thin under shear for easy application yet retain shape stability. The specific gravity of approximately 1.1 in the mixed adhesive provides a lightweight bonding solution, and the 150-minute pot life supports large-scale assembly operations, such as for large composite parts, reducing handling stress. The documentation emphasizes its very high lap shear strength and peel strength, evidenced in ISO 4587 tests where the adhesive maintains performance post-immersion, demonstrating excellent moisture resistance and toughness. Test data shows superior strength after curing (e.g., 16 hours at 40°C), enabling use in harsh environments.

Araldite AW4858/HW4858 is widely used in high-reliability structural bonding scenarios. For instance, in aerospace, it bonds composite aircraft wings and fuselage components, with moisture resistance and toughness ensuring stability in extreme climates; in automotive manufacturing, it joins metal frames and thermoplastic parts for lightweight design; in wind turbine production, the long pot life facilitates assembly of large blades, minimizing downtime. Additionally, in marine and construction industries, it is employed for metal-composite hybrid structures, offering durable, corrosion-resistant bonding.