73585980 - AFL Alcoa No. 2 Electrical Joint Compound 8oz

Technical Overview of AFL Alcoa No. 2 EJC

The AFL (formerly Alcoa) No. 2 Electrical Joint Compound (EJC) is a specialized chemical formulation designed to ensure the integrity of high-amperage electrical connections. In industrial and welding applications, the formation of aluminum oxide on conductors is a primary cause of increased resistance, thermal buildup, and eventual joint failure. This compound is chemically engineered to dissolve oxide films on contact, providing a low-resistance path for current flow.

Packaged in a convenient 8 oz squeeze bottle, No. 2 EJC is specifically intended for bolted connections, such as flat-pad bus bars, terminal lugs, and grounding clamps. Unlike compression compounds that may contain grit to bite through oxide, No. 2 is a smooth, non-gritted formula suitable for flat surfaces where maximum contact area is required. Upon application, the compound not only cleans the metal surface but also acts as a hermetic seal, preventing the ingress of moisture, air, and industrial contaminants that lead to galvanic corrosion.

For maintenance, repair, and operations (MRO) professionals, the use of Alcoa No. 2 EJC is a critical step in the assembly of aluminum-to-aluminum and aluminum-to-copper interfaces. It ensures that the electrical properties of the joint remain stable over time, even under thermal cycling and varying environmental conditions. This product is an industry standard for power distribution and heavy-duty welding cable assembly.