Mercury – Quicksilver Corrosion Guard | Rust Inhibitor Spray | 11 oz Can | 802878Q55

Overview

Saltwater, moisture, and time — the three biggest enemies of metal on your boat. The Mercury Marine 802878Q55 Quicksilver Corrosion Guard is your first line of defense. This easy-to-use spray-on rust inhibitor creates a thin, water-resistant barrier that protects both painted and bare metal surfaces from corrosion and oxidation. Ideal for outdrives, lower units, power trim components, and exposed hardware, it’s designed to keep your gear looking new and working reliably all season long.

Key Features

• Purpose: Protects metal surfaces from rust, salt, and oxidation damage.
• Formula: Creates a water-resistant film that shields bare or painted surfaces.
• Performance: Prevents corrosion and slows down existing rust formation.
• Durability: Works in fresh or saltwater conditions year-round.
• Ease of Use: 11 oz aerosol can allows smooth, even spray application.

Engine & Boat Compatibility

• Ideal for use on Mercury, Mariner, and MerCruiser equipment
• Works on outdrives, lower units, trim systems, engine brackets, and other exposed metals

Performance & Real-World Benefits

The 802878Q55 Corrosion Guard forms a clear, protective layer that keeps moisture, salt, and air from reaching the metal underneath. Spray it on clean surfaces to prevent rust, or use it over minor corrosion to stop it from spreading. It’s especially useful during long-term storage or off-season maintenance, protecting your equipment from humidity and oxidation.

The coating doesn’t wash away and stays flexible, even in harsh marine conditions. It’s the simple, year-round maintenance step that keeps your outboard or sterndrive looking sharp and performing like new.

Why Choose Mercury OEM

The Quicksilver 802878Q55 is a genuine Mercury Marine product, developed to meet factory standards for marine corrosion protection. While generic sprays may leave residues or break down over time, Mercury’s formulation is engineered for metal parts exposed to salt and constant moisture.

It’s the same product trusted by Mercury technicians to preserve metal housings and mechanical components. Choosing OEM means choosing proven protection that’s designed to work seamlessly with Mercury’s coatings and finishes.

FAQ

Q1: What can I use this on?
Use it on outdrives, lower units, power trim components, and exposed metal parts.

Q2: Can I spray it over paint?
Yes — it’s safe on both bare and painted metal, but avoid antifouling or biocide-coated surfaces.

Q3: What size is the can?
An 11 oz spray can, perfect for touch-ups or full seasonal applications.

Q4: Can I use it in saltwater environments?
Absolutely — it’s made to protect metal parts in both salt and freshwater conditions.

Q5: Why Mercury OEM over aftermarket sprays?
Mercury’s corrosion guard offers longer-lasting protection and is specifically designed for marine metals and coatings.