Mercury – Antifreeze, -50°F, 1 Gallon | Winterization | 92-851901K01

Overview

When cold weather rolls in, any boat or RV water system that isn’t protected can turn into a mess pretty quickly. This -50°F antifreeze is the stuff most seasoned boaters pour in when they're winterizing fresh-water systems. It runs clean, won’t harm seals or hoses, and keeps metal fittings from corroding while everything sits through the off-season. If you’ve ever opened a locker in spring and found a cracked fitting or split line, you already know why a good winterizing fluid matters.

Key Features

 • Non-Toxic Propylene Glycol Blend – Safe for potable-water systems and easy to flush out in spring.
 • -50°F Burst Protection – Helps keep lines from splitting during deep cold snaps.
 • 12–16°F Freeze Protection – Prevents solid freeze inside plumbing.
 • Corrosion Protection – Helps safeguard aluminum, brass, copper, and soldered joints.
 • Seal-Safe Formula – Won’t swell or dry out rubber parts or hose interiors.
 • Ready to Use – No mixing or thinning required.

Engine & Boat Compatibility

 • Marine freshwater systems
 • RV water systems
 • Cabin sinks and galley lines
 • Seasonal plumbing setups

Performance & Practical Benefits

This antifreeze pours smoothly, even in cold temps, so it pushes through long hose runs without fighting you. Once it’s in the system, it stays stable—no separation, no thickening—and protects metal and rubber parts all winter. Come spring, fittings and lines usually look just like they did when you put the boat away. It’s a simple step that saves you from expensive surprises in April.

Why Buy OEM

Mercury blends this antifreeze to work with the metals and seals commonly found in marine plumbing. It protects against corrosion and freeze damage without leaving residue or causing reactions in mixed-material systems. With OEM winterization products, you know exactly what’s going into your plumbing.

FAQ

Q1: When should I use this antifreeze?
A: Right after draining your freshwater system during fall winterization—before the first hard freeze.

Q2: Does it need to be diluted?
A: No—this formula is ready to use straight from the jug.

Q3: Is it safe for drinking-water lines?
A: Yes, it’s a non-toxic propylene glycol blend designed for potable systems.

Q4: What happens if the system wasn’t winterized properly?
A: Fittings can crack, hoses may split, and pumps can lock up from freeze damage.

Q5: Will it protect rubber and plastic parts?
A: Yes—it’s formulated not to harm seals, hose linings, or pump components.

• Supersessions
  92-851901, 92-8M0050288, 92-8M0073201, 92-8M0073201