The undercoat is sprayed onto the chassis and marketed as a rust inhibitor and promoted to customers, which also helps reduce road noise. It's always best to put the bearings on when you first buy a new car because they cover the surface, not road debris or other "stuff."
While most new cars, trucks, and SUVs are fairly well protected from the ground up, using a professional rubberized undercoating at a dealer is a smart investment for those who live in cold weather or areas with lots of saltwater.
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In most cases, this will only cost you a few hundred dollars and is worth the investment – especially if you've been traveling for more than five years.
Here are some of the benefits of primary applications:
1. Extend the life of the car
The greatest advantage of coating products is protection against corrosion over a long period. Most can last up to 10 years or more, which will help reduce rust and hence extend the life of your car.
2. Reduce road noise
An extra layer of insulation is always a great way to reduce distracting material noise. Whether it's a home or a car, the more cushioning between you and the cause of the noise, the quieter things will be. So, if you are concerned about traffic noise, consider this option.