The pros & cons of undercoating

Written by allen gagle
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The pros & cons of undercoating
When you paint a car you should consider if undercoating is worth it. (Jupiterimages/ Images)

Applying undercoating is a wise investment that will help further protect the chassis of your car. If you plan to keep your new car for a long time or if you live in a snowy area, then applying vehicle undercoating will help protect your valuable investment from the harsh elements.

Pro: Reduced Interior Noise

Applying undercoating will not only seal the metal parts on the undercarriage and help protect it from rust, it will also enhance the sound insulation of your car. Undercoating will seal the nooks and crannies on the undercarriage and will lessen the vibration caused by undulations on the road. You can expect a quieter ride with less tire roar when undercoating is applied.

Pro: Rust Protection

Most new cars have some kind of rust proofing applied on the undercarriage. Applying undercoating will help protect this antirust coating from chips and cracks caused by flying rocks or other road debris.

Pro: Durability

Undercoating provides long-lasting durability and abrasion resistance to further protect your vehicle undercarriage. This is most helpful to vehicles constantly exposed to off-road driving or extreme weather.

Con: Cost

While undercoating is less costly than custom rust-proofing procedures, the added cost of materials and labour is deemed unacceptable for a majority of new car owners. Applying undercoating will work better on brand-new vehicles, but will also benefit older model cars. Old vehicles will need a thorough wash of the undercarriage before applying undercoating.

The high cost is often attributed to car dealers that charge an astronomical sum for applying vehicle undercoating. You can save money in the procedure by purchasing aftermarket undercoating kits or sprays and applying them yourself.

Con: Weight

Vehicles that already have good sound insulation and rust proofing might not need an additional coat of undercoating. The added weight will affect vehicle performance and fuel economy.


Car owners who live in areas with snow or heavy rain and moisture will benefit from applying vehicle undercoating. Modern vehicles already come with advanced rust proofing and undercarriage protection -- usually enough to last the life of the car. If cost is no consideration, then vehicle undercoating might be worth installing on your car.

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