Underbody Coating
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5) It Makes Your Vehicle Heavier
It makes the vehicle 10 to 20 pounds heavier which affects fuel economy (how far you can travel on one tank of gas).
This is negligible in terms of fuel costs but still something to bear in mind.
6) It Can Be Damaged
Undercoating can be damaged.
Although you can expect a hard layer of protection against debris, driving on dirty or gravel roads often means the protective layer’s integrity will be reduced over time.
7) It Can Be Expensive
Reapply it every 3 to 5 years. This is the only way to ensure your vehicle is protected properly.
Since it can cost $1500 to get the undercoating professionally applied, this is quite a big cost to do it regularly.