Underbody Coating

UNDERBODY COATING

AIM: To Explain the underbody coating and is purpose.

EXPLANATION: Underbody coating is the formulation of spray that is applied to the chassis protecting it from rusting. Underbody Coating (also called under seal) is a thick resilient applied to the underbody or chassis of an automobile to protect against impact damage from small stone. Which would rapidly chip ordinary paint, allowing rusting to began. In Indian road conditions, a cars underbody is most prone to corrosion. Underbody coating provides long term protection from corrosion to car’s 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.

Protecting the underbody of the car should be our top priority. Especially during monsoon when heavy precipitation causes the roads to become mini –rivers and our cars are left standard there .This makes them prone to heavy corrosion in the underbody region.

This treatment is designed to provide long-term protection from rust to the under chassis. It protects the underbody substrates from:

• Environmental conditions
• Impacts
• Dampens sound and vibration
• Insulates against cold and heat
• Protects against Corrosion
• Seals off seams
• Hides welds, repairs & bodywork with spray

Modern Automotive Coating Processes

Modern Automotive Coating Process consist Of Five Main Steps. They include the following:-

1. Pretreatment:-Removes and cleans excess metal and forms an appropriate surface structure enabling bonding of a corrosion protection layer.

2. The next step is ELECTRODEPOSITION (ED) of an anti-corrosion or rust prevention layer.

3. A sealer like poly vinyl chloride (PVC) is applied for anti-corrosion, elimination of water leaks, and minimization of chipping and vibration noise.

4. A primer is then applied to promote adhesion between the surface and the basecoat. It also imparts a smoother surface for subsequent layers and has anti-chipping properties.

5. Finally the top coats that include a basecoat and clear coat are applied. They provide surface properties that are sought after, including color, appearance, gloss, smoothness, and weather resistance.

PURPOSE:

• Minimizes Sound:It minimizes the sound from underneath the car result a noiseless, smooth driving experience.
  
  Heat Insulation: It insulates the interior of the car from extreme temperatures from beneath the vehicle providing a comfortable cabin experience.
  
  • Anti-chipping property: If any stone hits the coating it does not get chipped away hence protect the underbody from exposure to water.

Different Types of undercoating

• Rubberized Undercoating. Rubberized undercoating is easy to apply, and generally offers the best protective coating for your car's undercarriage.
• Asphalt-Based Undercoating.
• Polyurethane Undercoating.
• Wax or Paraffin-Based Undercoating.

PROCESS LAYOUT OF UNDERBODY COATING;

Types of Undercoating

1. Rubberized Underbody Coating

This is generally thought of as the best underbody coating for your car. It preserves the underbody well, protecting it from scratches. Applying this to the undercarriage is not much of a hassle either.

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 out there.

3. Asphalt Based Automotive Undercoating

Best suited for 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

Advantages of Undercoating

Now we will tell you why you should consider investing in a vehicle underbody coating.

· Fights Rust

• It plays an important role in keeping corrosion at bay. Underbody coating can come in handy especially if you live near the sea, where there is too much humidity, and rusting is just one of those everyday things. You should also seriously consider undercoating if you reside in a place where it snows in winter.

· Absorbs Noise

Believe it or not, very thick undercoating can soften the noises that reach the cabin. Since the undercoating is often made up of rubber it absorbs some of the rackets. The occupants of the car could spare themselves of the road noises – at least up to certain extend.

· Reinforcement

If your car comes with stock underbody coating, using another coating on top of it is not going to hurt. It will offer additional reinforcement, protecting the underbody from water, road debris, gravel and small pebbles. There would also be a lesser chance for the factory coat to flake away.

List of the Pros of Undercoating

1. It provides a layer of protection against corrosion.
   When an undercoating is properly applied to a vehicle, then you’ll be providing the underbelly with a layer of protection against rust and corrosion. Instead of contacting the metal components of the vehicle, the debris encounters the undercoating, which then proactively repels the dangerous items away. Although an undercoating will eventually wear out, it can provide years of protection against premature corrosion.

2. It will extend the life of your vehicle.
   A proper undercoating extends the life of your vehicle because of its rust-stopping power. Corrosion does more than affect the integrity of the metals in your vehicle. It can get into your metal wires and cables, affecting any component which is comprised of steel or aluminum. Even your transmission and engine have exposure to rust when there isn’t a vehicle undercoating applied.

3. It can be applied to damaged areas.
   Over time, the underbelly of your vehicle is going to develop nicks, chips, and scratches because of the debris you encounter while driving. Unlike older forms of undercoating, which included the use of asphalt and animal fat, modern products provide a real layer of protection because it can morph into the various areas of small damage.

4. It can be self-applied.

Rust proofing works best when you have this service professionally applied to your vehicle. If money is tight, however, and you have some basic car maintenance skills, then you can do the work yourself.

If this service is applied at the dealership, it may cost up to $1,500, depending on the make and model of your vehicle. Some dealers include it in a package of services that are priced even higher. When you do the job yourself, then the cost can be less than $100 for cars and under $150 for trucks and SUVs.

Just keep in mind that you’re going to be creating a bit of a mess while applying a DIY undercoat.

5. There are multiple undercoating methods that can be used.
   There are four different undercoating methods that are commonly used on vehicles that require this service. The electronic method is used when rust is present to stop its corrosive effect, which is a method that receives mixed reviews. A standard undercoating method applies a tar-like substance to the exposed components of the vehicle underbelly. A drip less oil spray applies a waxy substance that fills in the entire body of the vehicle, which hardens when it dries. Then there is the drip-oil method, which may cause dripping for up to 48 hours when applied. From a cost perspective, it is this final option that is most often applied at the dealership.
6. The service might help with the cost of your insurance.
   Vehicular insurance is based on risk. If you reduce the risks of a claim by giving your vehicle a proactive service, of which an undercoating applies, then it may lower your overall premiums. States which see high levels of corrosiveness, such as Hawaii, typically see the steepest discounts with this advantage. Northern and coastal states in the U.S. might also see this benefit.
7. It may help to reduce interior noise.
   When you’re driving, the sounds of the road can be soothing if they aren’t too loud. For lightweight vehicles, noise pollution can be overwhelming to the driver in some situations. Applying a layer of undercoating creates a barrier against the sound, which creates an interior that is quieter. After the service is performed, many drivers notice that audio levels are noticeably lower inside their vehicles.

List of the Cons of Undercoating

1. It is less helpful if corrosion is already present.
For an undercoating to be the most effective, it should be in place before the underbelly of your car begins to rust. If you apply it over corrosion, you will still isolate the metal from further moisture and airflow, which is good, but the existing oxidizing/rusting process will still continue to occur. After rust is already present, applying an undercoating will slow the continuation of the corrosion process and will make your vehicle look better… until the rust breaks its way through the layer of undercoating you’ve applied. If you have rust present, it is better to remove the rust and then apply the undercoating.

2.

It works best on new cars.

If you’ve purchased a used vehicle, then the cost of preparing the underbelly for an undercoating might be more than the value of the car. You must remove from the bottom before it can be applied. Failing to do so will seal in the debris that is present already, which can lead to more problems. The best time to have an undercoating applied is when a vehicle is purchased new because it offers a superior level of protection then.

3.

Most vehicles make it five years before corrosion begins to show.

For vehicle owners who purchase something new every 3 to 5 years, then rust proofing may not be a good use of your cash. Although an undercoating does add value to a used car, only applies when the rust proofing product used provides a transferrable lifetime warranty. Most vehicles that are on the road today are able to make it five years before any corrosion begins to show. It may be 7 to 10 years before the functionality of the vehicle is negatively impacted by the lack of an undercoating.

4.

A third-party undercoating service might void your vehicle’s warranty.

Some new cars no longer need the undercoating service provided because the structure of the vehicle has it built-in already. If you hire a third-party provider the only way for an undercoating to provide ongoing protection for your vehicle is to have the service repeated frequently. Most owners can have a new layer applied in about 5 years without worrying about their underbelly being compromised. In salty or destructive environments, however, you may need to have a new undercoating applied every 3 years for the best results.

5.

. It adds weight to the vehicle.

Although the amount of weight added to a vehicle with an undercoating is minimal (between 10 to 20 pounds for most vehicles), there is a small element of fuel economy to consider. When your vehicle weighs more, the distance you can travel on a single tank of fuel is reduced. The undercoating might reduce your efficiency by up to one mile per gallon, which creates a small additional fuel cost .over time. Still, the effect on mileage of this additional weight is negligible compared to the effect a driver can have by the way they drive.

6.

An undercoating is not impervious to damage.

An undercoating can provide a hardened layer of protection against dirt and debris that may cause corrosion. Depending on where you drive, however, the lifespan of this product may be minimal. If you drive your vehicle on gravel roads or dirty areas frequently, you reduce the integrity of the protective layer.

7.

It must be reapplied every 3 to 5 years for the best results.
The only way for an undercoating to provide ongoing protection for your vehicle is to have the service repeated frequently. Most owners can have a new layer applied in about 5 years without worrying about their underbelly being compromised. In salty or destructive environments, however, you may need to have a new undercoating applied every 3 years for the best results.

The pros and cons of a vehicle undercoating offer a complex opportunity to protect some new and used cars, but not all new vehicles require it. You must perform your own due diligence on a vehicle. And, if the cost is an issue, it is possible to apply your own undercoating, though such an action might void an active warranty.