The ZNGUY1 Boat Lift Zinc Anode Replacement Kit (4-Pack) is designed to provide dependable sacrificial protection by corroding in place of your valuable metal components. Each anode includes a durable 10-foot stainless steel cable for quick installation and long-lasting performance, helping extend the life of your boat lift while reducing maintenance costs.

Whether you're replacing worn anodes or outfitting a smaller lift, this convenient 2-pack delivers reliable protection backed by The Zinc Guy's commitment to quality marine products.

Key Features

• Includes 4 premium marine-grade zinc anodes w/10-foot stainless steel cables for flexible installation
• Helps protect boat lifts from galvanic corrosion
• Designed for saltwater marine environments
• Easy to install and replace
• Durable construction for long-lasting performance
• Ideal for routine maintenance and replacement
• Trusted quality from The Zinc Guy

Maintenance Tip

Inspect your zinc anodes regularly. Once approximately 50% of the zinc has been consumed, replace them to maintain effective corrosion protection.

Ideal For

• Boat lifts
• Docks
• Pilings
• Seawalls
• Other submerged marine equipment

Do your products meet Mil-Spec?

Yes!  Sacrificial anodes must be impurity-free to properly work, and all our anodes are made only from Mil-Spec alloys. Our zinc anodes are also compliant to ASTM B418 Type 1.  Our Aluminum anodes conform to Mil-Spec A-24779(SH)

How much zinc do I need on my boat?

First, the larger the surface area of an anode, the higher its electrical current capacity and galvanic holding voltage.  For most boats, you want your anode surface area to be sufficient to maintain all underwater metals between -900 mV and -1100 mV relative to a silver/silver-chloride reference electrode.

Second, the longevity of a sacrificial anode is a function of its weight -- the greater the weight the longer its life.

Due to differences in water salinity, temperature, stray currents, and other external influences, you only know the right weight by actual trial.  Periodically inspect your zincs, and when they have corroded to under 50% their original weight they should be replaced.  To lengthen the replacement interval, increase the weight of zincs used.

We've designed hundreds of corrosion protection solutions for metal boats and underwater metal structures such as docks, boat lifts, and retaining walls.