Underbody Coating
Under- Body Coating
In the process of painting several layers of coatings are given over the surface of the car to make it suitable to withstand damage occurring by mechanical and chemical exposure. This coating process requires some additional coatings or different coatings depending upon the purpose for which it is served. The coating process which is done to underbody components between electrode deposition and primer coating processes is known as
underbody coating. [ADVANTAGE] It is done to prevent the underbody components of the automobile from corrosion, chipping (scratches and wear occurring while rocking and
stone strikes), heat resistance, noise resistance, vibration, and elimination of water leaks. Poly Vinyl Chloride (PVC) and acrylic resins are the materials used in the under-body
coating. [DISADVANTAGE] The cost of the underbody coating will increase depending
upon the surface area introduced for underbody coating processes,
Car Undercoating:
No matter the climate, the underbelly of every vehicle needs proper care and protection. Undercoating helps protect your vehicle against rust and corrosion.
Seals on the underbelly parts have gotten a lot tighter and more effective at keeping out dust and moisture, but there are other factors to consider. Poor roads, rocks getting
thrown from the tires and denting the metal, and corrosion from road salt in the winter all play a huge part in the damage or decay of a vehicle's underbelly. Used vehicles especially will need a little underbelly protection -- while it's already been exposed to contaminants and rust, applying undercoating will prevent further damage.
The Difference Between Rust Protection and Undercoating:
Undercoating and rust protection often go hand-in-hand, but they are actually two
different things. Rust protection generally goes inside your vehicle, while undercoating is used for protection outside of the vehicle, and there are a variety of coatings available. Depending on the level of damage and how much protection you want for your vehicle will determine which type of automotive undercoating you choose.
How to Undercoat Your Car:
You have a few options to select from while considering an undercoating for your vehicle. Obviously, if you are getting it done through an authorized dealer, then you would have no choice as they have their own preferences.
- Spray:
The spray is the most common method used by dealers. The spray consists of a tar-like substance that is applied to the undercarriage. It functions as a barrier for salt, moisture, and oxygen, which causes corrosion.
You can also purchase it as a DIY product, but the whole magic lies behind the method of application, so it's better to do the job with a dealer, especially if you have a new vehicle.
- Electronic:
Removing the electrical current capacity of items underneath the vehicles is another
method for applying to undercoat. A weak electric current circulates through the material, reducing the chances of rusting.
For using this method, a DIY solution wouldn't work; you would need an expert.
- Drip Oil Spray:
If you want to do it yourself, then drip oil spray is the best option. This can be messy but
incredibly effective at protecting the undercarriage. It covers every nook and corner of the chassis, forming a robust layer of protection.
Time is the factor where you have to show patience in this method. It takes a long time to dry. In some cases, it drips around 48 hours to a week.
- Dripless Oil Spray:
Coming to the last option, the dripless oil spray. This waxy substance is applied to the body and undercarriage, forming a strong protective layer. It doesn't take much time to dry; however, the layer can easily wear and tear than the other counter methods.
Different Types of Vehicle Undercoating:
Having undercoating professionally applied to your vehicle can be expensive, but
fortunately, if your budget is tight, you can do it yourself for a fraction of the price. Here are some of the various types of undercoating available.
■ Rubberized Undercoating
■ Polyurethane Undercoating
■ Wax or Paraffin-Based Undercoating
■ Asphalt-Based Undercoating
Rubberized -Undercoating:
Rubberized vehicle undercoating is easy to apply and offers sound-cushioning as well as protection from dust, moisture, and dings or dents.
In addition to your undercarriage, rubberized undercoating is also safe to use on wheel wells and quarter panels, 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.
Overall, rubberized coating is generally the best option for protecting your vehicle's
undercarriage, as it provides the simplest and best protective measures against rust and moisture.
Polyurethane Undercoating':
The other option for undercoating your vehicle is to use a polyurethane-based
sealant. This type of vehicle undercoating is a little bit quicker and easier to apply.
Oftentimes, polyurethane undercoating will come in canisters ready to preload into an
application gun. This type of sealant works by seeping into all cracks and seams, displacing salt and moisture and oozing around rusty areas to bond with and protect unoxidized
metal. It also sands quickly in case you'll need to perform bodywork and can be painted over.
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 Undercoating's:
A paraffin-based undercoating will be the cheapest and quickest option available with which to protect the undercarriage of your vehicle. 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.
Wax-based undercoatings never truly harden. During application, they drip or flow into seams and cracks to provide protective properties. They are usually available in a spray gun canister or in an aerosol can and offer at least a base protection in moderately humid climates.
Asphalt-Based Undercoating:
For standard vehicles, any of the aforementioned types of undercoating will provide
sufficient protection. For large trucks and heavy machinery, asphalt-based undercoating provides a bit of extra durability against rocks, chips, and moisture.
Asphalt-based undercoating generally contains a lithe bit of rubberized material that sets up firmly and also helps soften noise. Generally sold in five gallon containers, this type of undercoating also needs more cure time than the other three, and is NOT paintable,
making it best to use only for undercarriages.
Significance:
- Undercoating helps to provide an additional layer of insulation and protection to the
undercarriage of your vehicle.
- Manufacturers may apply car undercoating at the factory.
- The undercoating covers most of the car's underside, including floor boards, frame, gas tank, pans, wheel wells and mufflers, suspension parts and exhaust pipes. This effect can
be likened to black coating parking lot or a road.
- Undercoating materials adhere to metal, even if it is painted. Most of them come in
pressurized cans for easy spray-on application, while an even spread may be tough to achieve without professional applicators.
- Ingredients used in the manufacturing of undercoating include fiberglass, ceramics,
rubber, asphalt and silicone. Each has different properties in terms of heat resistance and retention, but all gives protection against the elements and damage.
- Auto undercoating protects the undercarriage, a vehicle's most vulnerable area. Unlike the visible portions of your vehicle, the undercarriage doesn't get washed frequently but
it absorbs most of the moisture, grime, salt and other substances when you come in contact with those, as you drive.
- In addition to protecting your vehicle from elemental damage, good undercoating can also reduce engine noise, leaving you quieter than ever before.
- Even though if you buy a new car with undercoating from the dealer, remember that
undercoating wears off typically within a short period of 1 year. Worn, patchy car
undercoating can get damaged when water and other elements then get trapped under the coat, further eroding metal.
Benefits of Undercoating::
Most of the vehicles manufactured these days are rust proofed, especially in rainy and
cold regions. When your car is exposed to saltwater and other common electrolytes,
investing in an undercoating from an authorized dealer is a smart investment. It does cost a few hundred dollars, but its worth it. It will keep your ride in good condition for five years.
- It extends the lifespan of your car:
The protection against rusting gives you the biggest advantage, which is the long-life of the vehicle. If undercoating is done the right way, then it will provide protection for up to
10 years. In some cases, the time span is more than ten years, which extends the lifespan of your vehicle.
- No more loud road noise:
The undercoating serves as an extra layer of insulation, reducing the noise from
penetrating inside components. Thus padding acts as a barrier between you and the source of the noise. If the road noise bothers you while driving your car, truck, or SUIT, then applying to undercoat can help you
Disadvantages of -Undercoating:
Nothing comes for free in this world. The same goes for undercoating. The undercoating or rustproofing spray is heavy in pockets. However, it is nothing when you compare it with the cost of replacing a vehicle after corrosion.
HOW to apply and remove au undercoating:
Materials Needed:
- DE-greaser
- Grinder
- Microfiber towels
- Paint (black automotive paint)
- Paint Brush
- Primer
- Safety Glasses
- Sandpaper (at least 220 grit or larger)
- Scraper
- Undercoating
- Undercoating removal spray
- Vehicle hoist
While you could pay someone to apply an undercoating to your vehicle, you can also save money by doing it yourself. Before beginning, make sure you have the right equipment to successfully complete the task and enough space to complete the task safely.
Clean the under-body: Start by cleaning the under-body of the vehicle. This requires you to put the vehicle up on a hoist.
Using a de-greaser, clean the underside of the vehicle.
Next, remove all rust from the undercarriage using a grinder. Make sure to wear eye protection when doing so.
Sand any remaining rust using sandpaper designed for metal. You need a sandpaper with a grit of at least 220 or larger.
Wipe away all of the dust created from grinding and sanding.
Paint and prime the under-body: After removing any rust, it is time to prime and paint the underside of the vehicle.
Start by priming all of the areas you cleaned of rust. One of the best primer types to use is a high zinc primer. Allow the primer to dry.
Your next step is to paint over the primer with black automotive paint. Allow the paint to dry.
Undercoat the under-bodv: The last step in the process requires you to apply an undercoating to the under-body of your vehicle.
Apply the undercoating liberally to the underbody of your vehicle. Make sure to apply it to every part that you expect to be exposed to the road. Allow this coat to dry for at least an hour, or longer if the instructions call for it.
Apply a second coat of undercoating to the bottom of your vehicle. Allow this coat to dry overnight before driving on the road,
- Tip: Use a rubberized undercoating for best results. A rubberized undercoating is more durable and seals better, protecting the metal from exposure to water. Other types of
material are Polyurethane, Asphalt and Wax/paraffin-based undercoating.
Removing all undercoating: Removing an undercoating is a simple process.
Spray the undercoating with an undercoating removal spray.
Once the undercoating has been softened enough, use a scraper to remove the undercoating.
While rustproofing is best applied when you first purchase a new vehicle, you can get
undercoating protection for your used vehicle to keep it safe from further exposure to
water, dirt, and other substances from the road. And while it will not protect your vehicle from rust already on the under-body of your vehicle, you can take steps to halt further corrosion.