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How Road Salt Hurts Your Car

12 Mar 2026Less than a minuteCar Wash
Topics: Car Wash•Car Wash Care•Car Wash Memberships

In Massachusetts, New Hampshire, and Maine, hundreds of thousands of tons of salt are applied to our winter roads every year to make them safe for travel. When you consider that our first storms often start in November and foul winter weather can stretch into April, that’s nearly half the year spent exposing our cars and trucks to the corrosive stuff.

 

 

Salt doesn’t just make your car look like a school science project, it’s doing a number on your car by quietly eating away at it. When moisture meets metal, it corrodes it. Salt is like a corrosion accelerant, trapping winter moisture against your car. It doesn’t rinse off naturally, and your garage won’t save your vehicle from salty slush. Even in freezing temperatures, it is causing damage to your ride; repeated exposure over those winter months just makes it worse.

 

 

Even if your car is newer, and you’ve invested in expensive protective coatings, it’s still at risk from the corrosive combination of salt and slush. Road salt attacks where it is most vulnerable:

 

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Undercarriage and frame

This is where salt sticks the longest, invisible unless you’re looking for it.

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Wheel wells and brake components

That constant salt spray from slushy roads finds its way into every nook and cranny.

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Door seams and hatch edges

 Salt has a way of getting into areas of your car you just don’t see.

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Paint and clear coat

What goes on can come off, especially with the help of a corrosive element like salt which can cause dulling, bubbling, and create the risk of rust long term.

If you’ve been in the camp of “let winter be winter,” putting up with a dirty car until spring finally arrives, you may want to rethink that position. Once it’s on your car, salt goes to work and not in a good way. Left untreated, the chances for long term damage increase. Even a thorough spring clean can’t reverse corrosion or rust that’s already there. 

So, what can you do? Consistently, and thoroughly wash your car during the winter months. This means top, sides, and, especially, the vulnerable undercarriage area. And, may we suggest not endangering yourself or your car by trying to wash it yourself in freezing temperatures. 

Regular professional washes in climate controlled facilities are your best bet to stop salt corrosion in its tracks. Here’s why:

  • Routinely washing your car removes salt before it can cause damage – better than an occasional deep clean.

  • Professional washes are designed to reach places a hose just can’t.

  • Undercarriage washes are especially critical in the winter months.

  • Climate controlled car washes are designed to service your car year round.

How often should you wash your car in the winter? We recommend:

  • Every 7-10 days during peak winter

  • After significant snowstorms or heavy salting conditions

  • More frequently when temperatures are fluctuating, creating a freeze/thaw cycle

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Bottom line: Consistency is key. Setting a regular carwashing schedule during the winter will help ensure your car stays corrosion-free year round. Think of them as preventive maintenance. 

 

Speaking of regular car washing, we have monthly car wash memberships that will make bathing your beauty a breeze this winter and year-round. Just $9.99 for the first month at any level, you’ll pay the equivalent of two washes after that for the kick of bringing your car in as many times as you need to wash off that pesky winter muck and restore your car to salt-free perfection. 

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