Underbody Coating
Undercoating is a thick resilient coating applied to the underbody or chassis of an automobile to protect against impact damage from small stones, which would rapidly chip ordinary paint, allowing rusting to begin.

The main purpose of undercoating is to check rust especially in the body components like frame rails along with other exposed metal parts. Underbody coating can also reduce wear and tear.
Types of Underbody coating-
1. Rubberized underbody coating
It protects vehicles from moisture, rust, road debris and more. It also reduces noise. Provides protection from water, salt and other chemicals. Resists Rust.
2. Wax based underbody coating
This – more or less – ephemeral undercoating will wear away in a few months’ time. On the upside, wax-based undercoating puts up a big fight against moisture. It is also the most affordable option.
3. 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.
4. Polyurethane 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.
Pros of Undercoating-
- Fights Rust
- Absorbs Noise
- Reinforcement
- Prolong Car's life
Cons of Undercoating-
Undercoating will work best on new vehicles that have not been exposed to road conditions. A used vehicle may already have residue on the bottom of the car or even have spots of rust and corrosion. Undercoating will not help if corrosion already exists and the corrosion needs to be removed first before it can be applied, which can be expensive.