Tecnoseal R3AL Rudder Anode - Aluminum - 3-3/4" Diameter

The Tecnoseal R3AL Rudder Anode in aluminum is a critical corrosion protection component designed for marine vessels with submerged rudder assemblies. Built to safeguard against galvanic corrosion—a destructive electrochemical process that attacks unprotected metal in saltwater environments—this sacrificial anode attracts corrosive elements away from your rudder's primary structure. Marine operators, boat owners, and commercial fishing vessel managers rely on high-quality rudder anodes to extend rudder life and prevent costly structural damage that can compromise steering integrity and safety.

Machined from marine-grade aluminum, the Tecnoseal R3AL Rudder Anode measures 3-3/4" (3.63") in outer diameter with a 0.52" height, offering full-size coverage for standard rudder installations. The compact 0.7 lb weight ensures minimal hydrodynamic drag while delivering effective anode surface area. Each unit includes a stainless steel hex nut and socket cap screw, with a captive design that simplifies installation and prevents fastener loss during underwater mounting. The aluminum composition provides superior electrochemical performance in saltwater applications, actively sacrificing itself to prevent corrosion on the rudder stem and blade assembly.

This rudder anode suits most recreational and commercial vessels with conventional rudder posts and outboard rudder assemblies. Installation involves securing the anode to the rudder body using the supplied stainless steel fasteners—a straightforward process that requires no special tools. For optimal performance, inspect and replace the anode annually or whenever it shows significant erosion, typically after 2–3 seasons of use depending on water salinity and vessel movement. Pairing the Tecnoseal R3AL with routine haul-outs and visual inspections ensures your rudder remains protected and fully functional throughout the boating season.