Underbody Coating

                                                                                                                              UNDERBODY COATING

          In Indian road conditions, a car underbody is most prone to corrosion. Underbody coating provides long term protection from corrosion to car 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.

Process and Types of Underbody Coating:

          The underbody coating is a hard coating on the underbody of the car, which is fast-drying, paintable, rubberized, non-toxic and chip-resistant all along the underside of the car, we can also get a thinner clear coat underbody coating which is like a lacquer that coats the entire underside of the car. Some even inject rust-preventive coating material into crevices such as the bottom of doors and door sills, to protect them from rust.

Types of Undercoating:

RUBBERIZED UNDERCOATING:

          Rubberized undercoating is easy to apply and generally offers the best protective coating for your car's undercarriage. It cushions surfaces against moisture, rust, dings, and dents. Rubberized undercoating is safe to use on quarter panels and wheel wells and dries with a soft rubbery finish,

ASPHALT-BASED UNDERCOATING:

          Asphalt-based undercoating offers a higher level of protection suitable for large trucks, recreational vehicles, and heavy machinery. It's formulated with some bits of rubberized material to aid in noise reduction. It offers extra protection against chips and moisture but is not paintable and therefore, only suitable for undercarriages.

POLYURETHANE UNDERCOATING:

          Polyurethane coating is easy to apply and works by sealing up cracks and seams. The compound displaces salt and moisture and protects the unoxidized metal from rust. It's often sold in canisters that are ready to preload into an application gun. It, however, requires some surface prep work before application, like degreasing, and applying an etching primer to the bare metal.

 WAX OR PARAFFIN-BASED UNDERCOATING:

          Wax or paraffin-based undercoating spray are the cheapest and quickest options available. However, their results don't last long, and you may have to apply a fresh coat after only a few months. In addition, the wax isn't very adhesive on a metal surface. Its main advantage is that it seeps quickly into cracks and seams, and offers moderate protective properties against moisture.

purpose:

Is easy to maintain - Giving the undercarriage of a vehicle a uniform appearance means cleaning it down is simpler and so is identifying possible problems.

Prevents stone chip damage - An underbody coating provides a durable elastic over the underbody and wheel arches which protects the substrate from stones, gravel, salt, and other debris which is thrown up by the road. Prevents water ingress - By covering cracks in the paint work or joints in the undercarriage of a vehicle, moisture or water from humid or wet environments is prevented from creeping into the underbody and causing corrosion.

Minimizes sound - The noise of debris hitting a vehicle, or vibrations from the road can be dampened by the application of an underbody coating. They prevent vibrations and because they are elastic they make far less noise when stroke than the metal underneath.

Protects from corrosion - The automotive coating process consists of at least five layers of protective and decorative paint. However, the underbody only

Receives the first two layers - the layers that provide the corrosion protection. But if that is the case why another layer of coating would be needed to protect from corrosion? The initial two layers provide corrosion protection.

Some of the downsides to underbody coating:

High cost - Cost of underbody coating has come down, but is still expensive. This is because underbody coating offered by a car dealer is one way in which they make money off the customer.

Risk of damage during application - Care must be taken while applying underbody coating. This thick rubberized paint if not applied properly, can get into moving mechanical parts and cause premature failure - such as into the U-joint or CV joints in a cars propeller shaft or drive shafts. They can also hinder smooth movement of suspension components, if applied incorrectly. And there's also the risk of overspray on to the car's paint finish on the lower edges of the car.

Some images of Underbody Coating: