Underbody Coating

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.

A  Car Body is made up of several Metals with

• Cast Iron and Advanced High Strength Steel makes up almost 65% of Car Body Weight

• Other Metals used Aluminium, Copper are then Predominant in Manufacturing Car

Rusting is layman language is Corrosion and Corrosion is what the direct reaction of Iron and its Alloys when comes in contact of Water or Air Moisture. So, essentially to make it simple - Any Iron material when exposed to both oxygen and water is bound to rust - unless a preventive coating is applied on to it. 

 

Do note that a car when Manufactured in Plant is made with

• Galvanized Process on Cast Iron and Iron Alloys
• Industry Approved Coating

Galvanization is basically using Advanced Zinc Coating on Car Metals. Zinc is what Anti Rust and these highly specialized coating prevent car under-body from Rusting.

Enough Protection done through Industry approved Coating Solutions by Car Manufacturer so that Car Under-Body, Doors, Boot, Body Panel do not get impacted by Rusting. Also, Galvanization is done with Rust Resistant Alloys to provide long lasting Output without any Corrosion.

Now - enough Protection in form of Anti Rust Coating is been done which can be offered for all regular drive conditions at Manufacturer end, and as such no need for further add on coating

For Areas with Moderate Weather, Rainfall - there is absolute no need for Anti Rust Coating. Its just waste of Money !!

But, for Coastal Area Regions or Areas with Heavy Rainfall

• Due to higher than normal Moisture

• Areas with Higher than Expected Rainfall

• Sea Water Proximity - The presence of salt acts as a catalyst, accelerating the corrosion chemical reaction process.

Though - to Differentiate from League - if you Intend to Hold Car for 10 Years or more. May be should go for Anti Rust Coating at the end of 4th or 5th Year. It rather involves slight complex task - been the Under Body needs to be Scrubbed, Cleaned, Degreased before applying Anti Rust Coating

Also - would rather be advisable to go in with Experts who can do detailing of Underbody - instead of only just simply spraying the Coating Chemical.

Image of Corrosive under body 

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

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 Undercoatings

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 little 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.

The Pros of Undercoating

The obvious pros of undercoating are the protection it provides to the carriage of your vehicle. If you live in an area where salt and sand are used on the roadways in cold weather, these materials can be corrosive to your vehicle. Undercoating gives you an extra layer of protection against rust and corrosion, protecting your car. Undercoating will eventually wear out, but you can get years of protection from it. Even vehicles in warmer climates gain protection as debris is repelled and kept away from eating at the vehicle.

Cons of Undercoating

Undercoating will work best on new vehicles that have not been exposed to road conditions. 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.