42066006 - Arcair Sea-Jet 3/8 x 18 Inch Underwater Exothermic Cutting Electrodes (Box of 50)

Technical Overview of Arcair Sea-Jet Exothermic Rods

The Arcair Sea-Jet 3/8" x 18" Underwater Cutting Rods (SKU: 42066006) represent a pinnacle in exothermic cutting technology designed specifically for the rigorous demands of subsea environments. These electrodes are engineered to produce extreme thermal energy, reaching temperatures in excess of 10,000°F (5,500°C). This intense heat is generated through an exothermic chemical reaction between the steel tube, internal alloy wires, and a supply of high-purity oxygen. Unlike standard welding electrodes that rely on a continuous electrical arc to melt base material, the Sea-Jet rod primarily uses the arc for ignition; once the reaction is established, the rod continues to burn as long as oxygen flow is maintained, allowing for the severance of non-conductive materials.

Structurally, the Sea-Jet rod consists of a mild steel outer tube containing a bundle of specially alloyed wires. This configuration optimizes the surface area for oxidation, ensuring a consistent and aggressive burn rate. The exterior is coated with a proprietary flux and waterproofing agent that insulates the rod, prevents electrical leakage, and stabilizes the arc during the ignition phase. This insulation is critical for diver safety and prevents side-arcing which can damage the torch collet. The 3/8-inch diameter is an industry-standard size, ensuring compatibility with the Arcair Sea-Dragon torch as well as other major underwater cutting torch brands.

These rods are classified as "all-purpose" cutting solutions. They are not limited to ferrous metals; the thermal mass and velocity of the jet allow them to cut through concrete, rock, barnacles, and composite materials found in marine salvage. The 18-inch length offers a balance between burn time and maneuverability, allowing divers to access tight spaces within wreckage or platform structures while maintaining a safe distance from the heat source. Each package contains 50 rods, sealed to prevent moisture ingress during storage.