Underbody Coating
Write a one-pager about Under-Body Coating and its purpose, its types in detail, and its pros and cons.
what underbody coating is done in car ?
For those of you who might not be in the know, as the name suggests, undercoating is usually a black, thick liquid that is sprayed on the underside or undercarriage of the car and is used to protect the metal from rust and corrosion. It is most commonly applied to vehicles that are used in wet or salty environments since it absorbs most of the moisture, grime, salt, and other chemicals which your motor vehicle comes into contact with on the road. Often confused with rust protection, which occurs in the inside of your car, undercoating happens outside, on the underbelly/undercarriage of your car. Undercoating can be applied as a liquid, typically sprayed or brushed on, then allowed to dry. It helps to protect the axle, engine, brake system, transmission, exhaust and fuel systems, suspension parts, gas tank, and floorboards. Undercoating can be sprayed on any type of car, truck, or SUV. The type one chooses to use is often determined by the level of damage your car has sustained and/or the extent to which you would like to protect its underbelly.
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.
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.
Advantages:
- Easy to apply
- Quickly applied with no fuss
- 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
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.
Advantages:
- 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
Disadvantages:
- 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
3] Asphalt Based Automotive Undercoating
Best suited for lorries, 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.
Advantages:
- Formulated to protect from dirt, rust, and corrosion, it normally has a shelf life of up to two years. Sold in five-gallon containers
- Provides extra durability as it is the strongest and thickest undercoating available
Disadvantages:
- 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
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:
- 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 fills them, hence protecting the underlying metal
- Quick and simple to remove, as it sands easily
- Dislodges salt, moisture, and oozing around rusty areas to bond with and protect unoxidised metal
- Can be painted over
Disadvantages:
- For better adherence, needs undercarriage preparation before application
- Requires time-consuming etching with primer to bare metals
PROS OF 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 a 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.
Prolong Car’s Life
Good undercoating not only defends the underbody from corrosion but also protects the engine and transmission as well! Less rusting coupled with slower wear and tear can surely add years to the lifespan of your vehicle. There would be fewer dents, dings and scratches on the undercarriage for you to fret about.
CONS OF UNDERBODY COATING
A used vehicle may already have residue on the bottom of the car or even have spots of rust and corrosion. Undercoating will not help you if corrosion already exists and the corrosion needs to be removed first before it can be applied, which can be expensive for you.
references:-
https://jalopytalk.com/types-of-undercoating/
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