Winter driving throws plenty of challenges your way—think shoveling snow, chiseling ice off windshields, or dealing with foggy glass that sometimes cracks. You’ve likely already winterized your vehicle, but there’s another hurdle: road salt. Essential for safer roads after storms, salt can wreak havoc on your car’s metal parts. Thankfully, with a few smart strategies, you can minimize salt damage and keep your vehicle in top shape this season.
What’s in Road Salt?
Road salt isn’t just one thing—it comes in three forms: vacuum, rock, and sea salt. These are mixed into formulations like sodium chloride, magnesium chloride, calcium chloride, or potassium chloride, depending on the region. Some areas even apply a salt brine preemptively before snow hits, boosting safety but amplifying the threat to your car. Curious about the science behind salting roads? Jalopnik has a great explainer worth checking out.
How Salt Harms Your Vehicle
Salt’s impact on cars is brutal, and mechanic Chris Jenak from Glastonbury Oil and Service in Connecticut sums it up perfectly in a News 8 interview. He notes, “Older salt-and-sand mixes caused rust, but modern calcium chloride takes it to another level—rotting brake lines, fuel lines, pumps, and even frames.” Anything metallic—like the exhaust system, muffler, coil springs, subframe, or hydraulic brakes—falls victim. Jenak explains further: “Normal rust happens, but calcium chloride supercharges corrosion. It’s moisture-activated, so even summer rain or dew keeps it eating away at metal long after winter ends.” That lingering effect makes it a year-round menace.
Top Ways to Prevent Salt Damage
No matter the salt type in your area, these practical tips from DMV.org can help protect your car from winter salt damage.
- Apply Wax Before Winter
Coat your vehicle with wax annually, ideally just before the cold hits. This barrier helps fend off salt’s corrosive grip. - Wash Off Salt Quickly
Rinse your car as soon as possible after driving on salted roads. Even if you’re a DIY washer, a trip to the car wash can save time and effort here. - Clean the Undercarriage
Don’t neglect the underside—it’s a salt magnet. Whether at home or a car wash, ensure the bottom gets a thorough spray to remove hidden buildup. - Pre-Treat the Underbelly
Some auto shops offer undercarriage pre-treatments. This extra layer of protection can be a game-changer against rust. - Inspect Before Winter Strikes
Check your car pre-season, either yourself (if you’re handy) or with a pro. Spotting and fixing weak or rusty spots now prevents salt from turning them into bigger problems later. - Avoid Puddles and Plow Trucks
Steer clear of puddles—they’re often salt soup—and keep distance from plow trucks. While it feels safer behind them, your car gets blasted with maximum salt exposure, which is best avoided.
Why This Matters
Winter salt keeps roads drivable, but its toll on vehicles is undeniable. By waxing early, washing frequently, and dodging salt-heavy zones, you’re not just preserving your car’s looks—you’re safeguarding critical components like brakes and frames. With these steps, you can enjoy safer winter drives without sacrificing your vehicle’s longevity.
