Underbody Coating

Underbody coating:

In Indian road conditions, a car's underbody is most prone to corrosion. Underbody coating provides long-term protection from corrosion to the car’s underbody. It also protects parts like internal body panels, frame rails, and other inner cavities that are not physically accessible but are prone to corrosion.

Types of underbody coating:

Now let us look at the various kinds of automotive underbody coating you can go for, for your vehicle.

1. ED Coating:

It is known by many names like Electrodeposition, Electrophoretic, Electrophoresis Coating, Cationic E-Coat, and Cathodic Electro Deposition just to name a few. An organic coating method uses electrical current to deposit paint onto a part or assembled product.

2. Rubberised underbody coating:

This is generally thought of as the best underbody coating for your car. It preserves the underbody well, protecting it from scratches. Applying this to the undercarriage is not much of a hassle either.

3. Wax-based underbody coating:

This – more or less – ephemeral undercoating will wear away in a few months. On the upside, wax-based undercoating puts up a big fight against moisture. It is also the most affordable option out there.

• Asphalt based Automotive Underbody Coating:

Best suited for lorries, trucks, and large vehicles this provides a greater degree of protection compared to rubber-based coatings. However, asphalt-based coatings contain little amounts of rubber for sound insulation purposes. The process of applying this coating is a bit time-consuming though.

• Polyurethene Underbody coating:

This coating closes up splits and fractures on the underbody of the vehicle. It offers up good protection against corrosion and also bonds with the metal. Unlike in the case of asphalt-based coating, you can paint over the polyurethane coating.

Benefits:

• Minimizes Sound: It minimizes the sound from underneath the car resulting from a noiseless, smooth driving experience.

• Heat Insulation: It insulates the interior of the car from extreme temperatures from beneath the vehicle providing a comfortable cabin experience.

• Anti-chipping property: If any stone hits the coating it does not get chipped away hence protects the underbody from exposure to water.

• Pros:

1. Rust Prevention: Underbody coating ideally should be applied when the car comes out new from the factory when there are no dust particles present. This will result in a good adhesive coating to prevent rusting of the underbody surface and also extending the life of the parts. It becomes extremely important to apply this coating when the vehicle is to be driven close to coastal areas.
2. Protection against debris: It is one of the primary reasons for applying an underbody coating. During its lifetime, a vehicle travels over debris the entire time, and this is especially true for Indian roads. This debris flies off from the tyres and hit the underbody, and can possibly damage the underbody components which can get expensive. By giving a sufficient coating the longevity of the surface can be increased. 
3. Sound reduction: Applying thick layers of covering can reduce the sound within the cabin up to a certain degree. Rubberized paint can reduce the noise from the tyres, the road and the debris.
4. Easier maintenance of the vehicle: By giving a uniform coating, the underbody is well protected from moisture, which means that for cleaning the underbody water can be used. A good coating can ensure that water does not enter the components and start rusting prematurely. The coating also prevents the retention of water within the parts, which can lead to the creation of slush.

• Cons:

1. High cost: The cost of underbody coating has reduced over the years, but it is still expensive. The option of applying a coat at the dealership can get quite expensive since dealerships will look forward to making profits and hence increasing the price for an underbody coating.
2. Damage during application: In the case of thick rubberized paints, if the coating is not applied properly, then there is a possibility of the paint getting into moving parts and create mechanical failures. It can affect the differential, propeller shafts, joints and even the suspension. If not done carefully, there is also the possibility of the coat damaging the paint job at the lower edges of the car.
3. Added weight: Although insignificant, there is a possibility that the extra weight can affect the fuel economy of the vehicle.