Underbody Coating

The Under-Body Coating

The under-body coating is a coating applied to every car under the body.  This coating helps to protect the car's underbody from rust, corrosion, dust, and even weather condition. The under-body coating also gives results in vehicle performance and stability. 

Pros of Under-body Coating

• Corrosion, rust, dust Resistance
• It gives heating insulation to the inside car.
•  It minimizes the sound from underneath the car resulting in a noiseless, smooth driving experience
• If any stone hits the coating it does not get chipped away hence protecting the underbody from exposure to water

Cons of Under-body Coating

• It adds weight to the card
• If corrosion already happens the underbody coating is useless
• Third-Party Underbody coating may void the vehicle's performance

Types of Under-Body Coating

1. Wax or Paraffin-Based Under-Body Coating

It is the preferred undercarriage coating for cars often driven on the highway or on normal roads Sometimes referred to as wax-based undercoating, it provides sufficient guard for cars in fairly moist regions.

Pros

• Readily flows into seams to guarantee any exposed and prone surfaces are protected 
• The most inexpensive undercoating option
• Conveniently available in spray guy canisters or aerosol cans

Cons

• Wears off quicker in comparison to other types
• Unlike the rubberized type, it does not really dry
• Needs to be stripped and reapplied at least once a year as soon as signs of wear and tear start to show

2. Rubberzed Under-Body Coating

Ideal for cars driven in rough terrain, as its name suggests, this undercarriage coating involves applying a rubber agent to the underbelly to protect and cushion it against dents, dust, and moisture. Considered the best option for standard vehicles when it comes to the different types of undercoating.  

Pros

• Easy to apply
• Quickly applied with no fuss
• The undercoat can be painted for a neat finish
• Provides satisfactory protection
• The simplest way to undercoat your car
• Safe to apply
• Truly dries to a soft rubbery finish that prevents further rust, damage, or moisture seepage   

3. Polyurethane Undercoating 

  Uses a polyurethane-based sealant that comes in canisters ready to be loaded into a spray gun and sprayed to guard the undercarriage of your vehicle. The polyurethane used in this product is a high-quality and durable material that is perfect for any weather condition. It is ideal for standard vehicles.

Pros

• It has a long lifespan and is resistant to wear and tear
• Easily and quickly applicable
• Trickles into cracks and rusty spots already present on the underbelly of your car and fill them, hence protecting the underlying metal
• Quick and simple to remove, as it sands easily

Cons

• For better adherence, needs undercarriage preparation before application
• Requires time-consuming etching with primer to bare metals

4. Asphalt-Based Under-Body Coating 

Unlike the rubberized, wax/paraffin-based, and Polyutherane undercoatings, this type is made of asphalt and generally also contains some rubberized material that sets up firmly and helps soften noise from the engine.  It reportedly has the most damage-resistant properties. Although asphalt-based undercoating is ideal for trucks, military, and all-terrain vehicles, it will also help protect your car, truck, motorcycle, and heavy machinery from the elements. It last long and is best for endurance vehicles that have to undergo heavy road use. When it comes to large trucks, heavy machinery, military, and all-terrain vehicles, asphalt-based undercoating provides added durability against rocks, chips, and moisture. It’s usually available from professional service shops.

Pros

• Formulated to protect from dirt, rust, and corrosion, it normally has a shelf life of up to two years.
• Provides extra durability as it is the strongest and thickest undercoating available

Cons

• It takes time to harden and so requires more cure time than the other three types
• Unlike the other three, it is also, not paintable as such, not very aesthetically suitable for standard vehicles
• For best used only for the undercarriages of utility vehicles and trucks
• The only type of undercoating with a limited warranty

5. Water-based Under-Body Coating

It is a protective layer that helps your car stay protected from harsh weather conditions.  It is made from an advanced polymer that is non-toxic and environmentally friendly. The product can be applied to any surface, including metal, plastic, rubber, and glass. It will keep your car protected from rust, salt, and moisture. This undercoating provides a protective barrier that lasts for only a year-depending on where you drive your car. When it comes to DIY (Do it Yourself) undercoating, this type is the most popular. Coming in an aerosol can, it can be purchased from most automotive shops. This product is easy to apply and can be done in a single day.

Pros

• Thin-set, it takes a short time to dry
• Can be done at home

Cons

• It requires frequent repetition as it’s not very durable
• It cannot repel ice and water like petroleum-based undercoating

6. Petroleum-based undercoating

It is a heavy, viscous oil-based liquid product that provides an effective barrier against moisture and corrosion. The liquid dries and hardens to provide tough, durable, and long-lasting protection against moisture and corrosion. This product is typically applied to the undercarriage of automobiles, trucks, and other vehicles. Petroleum-based undercoating can be purchased from your professional vehicle servicing shops. Examples of Petroleum-Based undercoating are CRC Heavy Duty Corrosion Inhibitor and the Fluid Film Rust Inhibitor for rust prevention and anti-corrosion.

Pros

• Has greater deflective abilities for road salts and grime
• Repels ice and water because of its petroleum base

Cons

• Requires annual replacement