Underbody Coating

Underbody of a monocoque is the bottom part of the car. The thickness of the sheet metal used in the underbody depends on the various structures inside the body. It also depends on the safety rating the designer is pursuing. In general, the thickness of the sheet metal used will vary between 300 micrometer to 900 micrometer (Also known as 30 gauge to 20 gauge in the US).

The underbody of the car is also applied with sealants for a number of reasons. These sealants fill in the gaps between sheet metals leading to not only a reinforced structure but also reducing noise from the outside in the cabin. Sealants are also used in the fixtures and area that hold the components on the underbody. It can be used in places where the suspension system is fastened to the body to give more strength to the joint.

Underbody coating is a protective coating done to the underside of the car to protect it from small chunks of stone, dust, rubber, metal and other debris that might come off from the road and the tire of the vehicle. The small chucks have the potential to cause abrasions on the underbody, exposing the underbody to corrosion from various climate conditions eventually.

Underbody coating are usually also confused with rust free coating. While rust-free coating only reduces the chances of the car being rusted, underbody coating protects it from small debris. The thickness of the underbody coating can vary depending on the material used in the spray. The average underbody coating thickness is usually between to 10 micrometer to 30 micrometer.

Various underbody coating are as follows:

Rubberised Underbody Coating

Fluid Film Underbody Coting

Rust Free Underbody Coating

Wax Underbody Coating