Underbody Coating

Under Body Coating

Underbody coating is the coating that is provided to the underbody of the car to protect the underbody and other components like frame rails, sub-frame, etc. from corrosion and chipping due to stones and other particles which are splattered by the tires to the underbody.

Advantages of underbody coating:

1. Prevents corrosion to the underbody of the chasse.
2. Prevents Chipping and damages due to stones and other debris on the road which are thrown by the tire to the underbody.
3. Reduces the chasse's vibration, reducing sound levels inside the cabin.

Disadvantages of underbody coating:

1. Not a permanent solution thus has to be recoated after some years.
2. Increase the maintenance cost of the vehicle.

There are different types of underbody coatings. They are as follows,

1. Rubberized Coating

Rubberized vehicle undercoating is easy to apply and provides sound isolation and protects from rust and chipping.

In addition to undercarriage, rubberized undercoating is also safe to use on wheel wells and quarter panels, and dries to a soft rubbery finish that prevents further rust, damage, or moisture seeps. The coating can be painted over and, if necessary for bodywork, can be easily removed with an undercoating removal spray.

2. Polyurethane Undercoating

The other option for undercoating your vehicle is to use a polyurethane-based sealant. This type of vehicle undercoating is a little bit quicker and easier to apply.

Oftentimes, polyurethane undercoating will come in canisters ready to preload into an application gun. This type of sealant works by seeping into all cracks and seams, displacing salt and moisture, and oozing around rust areas to bond with and protect the unoxidized metal. It also sands quickly in case you’ll need to perform bodywork and can be painted over.

3. Wax or Paraffin-Based Undercoating

A paraffin-based undercoating will be the cheapest and quickest option available with which to protect the undercarriage of your vehicle. However, keep in mind that it will wear off more quickly than other types of undercoating and will need to be stripped and reapplied at least once every year.

Wax-based undercoatings never truly harden. They drip or flow into seams and cracks during application to provide protective properties. They are usually available in a spray gun canister or an aerosol can and offer at least ab protection in moderately humid climates.

4. Asphalt-Based Undercoating

For standard vehicles, any of the aforementioned types of undercoating will provide sufficient protection. For large trucks and heavy machinery, asphalt-based undercoating provides a bit extra durability against the rock, chip, and moisture.

Asphalt-based undercoating generally contains a bit of rubberized material that sets up firmly and helps soften noise. Generally sold in five-gallon containers, this type of undercoating also needs more cure time than the other three, and is not paintable, making it best to use only for undercarriages.