Underbody Coating
Underbody Coating:
No matter the climate, the underbelly of every vehicle needs proper care and protection. Underbody coating helps protect your vehicle against rust and corrosion. Poor roads, rocks getting thrown from the tires and denting the metal, and corrosion from water, mud play a huge part in the damage or decay of a vehicle's underbelly.
Different benifits of underboady coating:
Rust prevention
Absorb noise
Reinforcement
Increases strength and life-cycle
Below picture shows before and after underbody coating.

Types of Underboady coating its benifits and diadvantages:
Rubberized Underbody coating:
As the name says its made of rubber, easy to apply 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.
Polyurethane Undercoating 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 also its quiker and easyto apply. Like in rubberized coating one can paint over the polyurethane coating.
On the flipside, this type of car undercoating generally requires a little bit more surface prep work before applying ,sanding and applying an etching primer to bare metals before using are generally recommended.
Wax or Paraffin-Based Underbody coating:
A paraffin-based undercoating will be the cheapest and quickest option available with which to protect the undercarriage of your vehicle. Wax-based undercoatings never truly harden but wax-based undercoating puts up a big fight against moisture.
However, keep in mind that it will wear off quicker than other types of undercoating and will need to be stripped and reapplied at least once every year.
Asphalt Based Underbody coating:
This is specially for large trucks and heavy machinery, asphalt-based undercoating provides a bit of extra durability against rocks, chips, and moisture. It generally contains a little bit of rubberized material that sets up firmly and also helps soften noise, require more cure time than the other three,and is NOT paintable, making it best to use only for undercarriages. The process of applying this coating is a bit time-consuming.