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    1. All products
    2. Clean and Protect
    3. Metal, Corrosion & Engine
    4. Corrosion Protection & Lubricants
    5. Corrosion & Rust Inhibitors
    6. Corrosion Block Liquid 4-Liter Refill - Non-Hazmat, Non-Flammable & Non-Toxic
    7. Corrosion & Rust Inhibitors
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    Corrosion Block Liquid 4-Liter Refill - Non-Hazmat, Non-Flammable & Non-Toxic

    Moisture and salt water are hard on the metal and wiring of your boat. This clean fluid works its way into joints, connectors and fasteners, then leaves a clear film that sheds water.

    Ships in 2 to 3 business days, Monday through Friday. Carrier transit time is added separately. Shipping details

    • Product Type
    Item #20004
    Available Online Only
    Not available for in-store pickup
    Delivery
    Available
    Shipping options and cost are shown at checkout, before you pay.
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    Price
    $ 159.99 $ 159.99 (Tax excluded)
    $ 159.99 (Tax excluded)

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    Shipping calculated at checkout.
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    Product Type: Corrosion Protection

    Specifications

    BrandCorrosion Block
    Manufacturer part number20004
    UPC770153200045
    Product TypeCorrosion Protection
    Shipping weight8.05 lb
    CategoryMetal, Corrosion & Engine

    Materials & Construction

    Corrosion Block Liquid is a synthetic, polar-bonding fluid that displaces salt water from metal surfaces and leaves behind a clear, moisture-proof film to prevent new corrosion from forming.

    Product Description

    Why you'll want it

    • Pushes salt water out. The fluid soaks into corrosion cells and takes the place of the salt water, which then dries away. It reaches deep into joints and around fasteners, the tight spots that are hard to treat.
    • Clean, not waxy. Unlike a waxy coating, it leaves a clean, clear film. Your switches, locks and connectors get protection without a waxy layer on them.
    • Easy to keep on hand. It is non-toxic, non-flammable and non-hazmat. A large refill like this is an easy one to keep in the shop or the dock box.
    • Treat it before winter storage. Before the boat sits for winter, treat the battery terminals, fuse panels and connectors. The film stays on to help protect them while the boat waits for spring.

    What it is

    Corrosion Block Liquid is a corrosion inhibitor (a fluid that helps keep metal from corroding), sold here as a 4-liter refill. Corrosion Block says it bonds to metal and leaves a hydrophobic film, which means a film that repels water. It is made to protect both metal parts and electronics.

    What else the job needs

    A wire brush and clean rags help you prep terminals and connectors before you treat them. Pair it with a marine grease and battery care products for a full electrical tune-up.

    Frequently Asked Questions