Why Water Is Bad For Your Car

Water is your car's enemy. Protect your car against rust and corrosion, saltwater, mold, mildew, smells, and stains. Waterproof seat covers to choose from.
 Your car has an enemy. That enemy is everywhere and at times invisible. The enemy is water.

While your car requires water to run properly and regulate the temperature, over time water can damage every part of a vehicle. Rain, snow, and even humid climates can cause water damage to a car.

Rust and corrosion

The metal in a car is highly susceptible to rust, which can form even under the cover in humid environments. Iron oxide is easily formed and can rust vehicles in almost any climate.

Over time, rust and corrosion can:

  • Eat away at the car’s body, compromising safety
  • Damage electronics housed near other metal parts of the car
  • If engine drains are clogged, rust can weaken the exhaust and damage the trunk, causing leaks
  • On the vulnerable underside of the car, rust can lead to oil and fuel leaks
To prevent rust damage, treat paint scrapes and dents immediately. If rust is spotted, use a rust repair kit to stop it while it is small. Add a layer of rust protection to the underside of your car if you live in a wet climate or drive in harsh wet conditions, and keep the car covered when it’s not in use. For extensive rust and corrosion, it’s best to take the car to an auto body shop.


Saltwater is highly corrosive and damaging to a car. Saltwater in the air can travel several miles inward from the coastline, and affect cars in morning dew and humidity. And in many cities salt is used to melt snow and ice on winter roads.

Saltwater can:

  • Cause rust and corrosion faster than fresh water
  • Cause leaking fuel or brake lines
  • Corrode brake calipers, nuts, and bolts
To avoid saltwater damage, don’t drive on sand or in ocean water, and avoid salt water splashing up onto the underside of your car. If your car is exposed to salt water, wash it thoroughly, paying special attention to the underside, followed by waxing the body. If living near salt water is a part of daily life, use a hose to rinse the car and underside frequently, and store the car in a garage, particularly during winter.

Mold and mildew

Inside the car, mold and mildew can invisibly form. Mold and mildew thrive in damp, closed environments, and a damp car interior is an ideal breeding ground. Mold and mildew can be caused by incomplete drying after a car wash, flooding or water leaks, even transporting certain kinds of plants which carry mold spores.

Mold and mildew inside a car will:

  • Cause an unpleasant smell
  • Damage carpet, seats, fabrics, and upholstery
  • Mold and mildew are common allergens and are harmful to breathe
To avoid forming mold, always dry the car thoroughly after detailing and repair any interior water leaks. Mold cannot grow in dry environments. To remove mold that has formed, wear personal protective equipment, including a respirator, remove contaminated materials, and dispose of them. Use a HEPA vacuum to clean all remaining surfaces, followed by a disinfectant. If mold and mildew are severe, you may need to hire a professional, who has access to mold-removing products and equipment not available to the public.

Smells and stains

Even without mold and mildew, water and moisture can cause an unpleasant odor inside the car, and water can stain seats and upholstery. Eating in the car, particularly when there are children involved, will eventually cause spills and damage. Pets can also be a source of stains and water damage inside a car, and driving after a workout or physical exertion can leave damp stains and odor in car seats.

Left untreated, smells and stains:

  • Might be an indicator of mold or mildew and carry a health risk
  • Require extensive time or expense to clean
  • Decrease the car’s value
To prevent smells and stains, keep a basic cleaning kit inside your car to wipe or soak up spills immediately before they set in. If a stain has formed, use the appropriate upholstery cleaner to treat it. Sprinkling baking soda on floors and carpets before a thorough vacuum can help absorb odors.

To prevent spills and stains from damaging the car’s interior, consider using easy-to-clean, waterproof seat protectors like these:


AULLY PARK Universal Waterproof Car Seat Cover Protector   This seat protector from Aully Park is designed to protect car seats from stains, sweat, dirt, and odor. It wicks away moisture and is perfect for athletes. Portable, easy to install, and machine washable, this seat protector is a great solution to protect car seats as-needed and then folded compactly out of the way. Made from polyester terry and EVA, it is waterproof and pet- friendly and comes with a 100% money-back lifetime guarantee.

CleanRide™: Bacteria-Resistant, 100% Waterproof Car Seat Cover  The CleanRide seat protector is lightweight, easy to use, and easy to store. It wicks away sweat and moisture and is bacteria-resistant for extra odor protection. Waterproof and easy to clean, the CleanRide seat protector is made in the USA and perfect for protecting car seats from moisture and wear. Whether you are sweaty from a workout or caught in an unexpected rainstorm, you can protect the inside of your car from moisture, odor, and unwanted bacteria.


Infina Waterproof Car Seat Cover  Infina car seat cover is made of neoprene, the same material used in scuba suits, so it’s completely waterproof. This car seat cover will not slip on the seat, so you can drive in comfort. Protecting your car seats from wetness and odor caused by workouts, preventing stains and damage from traveling with children or pets, and carrying a money-back guarantee, this seat cover is easy to install and remove.

Spending a little time or money to prevent water from penetrating and damaging your car is important to keep the car running well and preserve the resale value. Water can have a negative impact on every part of your car, so take steps to protect it.


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