How Much Does Undercoating Cost?

Undercoating is a vital component in any painting project, and any good commercial painter would agree on its importance.  Undercoating may be considered as an additional expense for most people, but it will do wonders in the overall quality of the finished work.  The importance of undercoating in car paint jobs is no exception.  With undercoating, your car will be given a velvet-smooth surface and an even color.  It is also important as it prevents rust and corrosion.  In addition, undercoating provides an additional layer of protection and insulation to the undercarriage of a vehicle.  Not to mention that a good undercoating can make your car sound and feel more luxurious and smooth when it is on the road.


How much does it cost?

  • The average cost of having an undercoating job for your car can be around $150 to over $500. The exact price, however, depends on many factors such as the type of vehicle you need undercoated, your location in the country, and the shop or dealer that you choose to perform the job.
  •, a particular site that deals with car maintenance and restoration, gives a starting price of $249 for an undercoat.  The said amount is already inclusive to labor and all the materials used.  The price, however, goes up depending on the particular vehicle that is being undercoated.
  • If you are adept in cars and are up to doing everything on your own, you can just buy undercoating products.  Undercoating sprays can be bought online or through your local stores.  For instance, sells rubberized undercoating sprays that start at $10 and go up from there depending on the quality of the product.


What is going to be included?

  • Undercoating is important for vehicles since it stops the water, ice and salt on the roads from corroding the underside of your car.  If you want your car to be undercoated, you just need to bring it to the nearest shop and the mechanic will basically perform the entire job.  The fee you will be paying will be inclusive to the undercoat products, necessary materials and the labor for the undercoat.  Other car dealerships also sell undercoating packages to their customers. It is your own prerogative to go to the dealer or to a third party support.
  • According to, the process usually starts by cleaning off your car, most especially the underside of it.  Degreaser, grinder and metal sandpaper will be used in cleaning and getting rid of the car’s rust spots.  Once everything is clean, the painting and priming will come next.  All the spots being cleaned will be primed with a primer.  After it has dried, the area will be painted with black automotive paint.  Once dried, the actual car undercoating will be done.  While using a paintbrush, you need to apply the undercoat liberally.  Make sure to cover all the parts exposed to the road.  Otherwise, you are defeating the purpose of having an undercoat.
  • Let the first coat dry for at least an hour and then apply the second thick coat.  You can leave it overnight or the next 24 hours would be favorable.

What are the extra costs?

  • Rust-proofing.  Although usually confused with undercoating, rust proofing is a totally different thing.  If you want to fully protect your car from early rusting, you can have it rust-proofed.  The price for this is almost similar with undercoating. gives a starting price of $299 for rust-proofing.
  • Paint protection film.  This is another way of having your car protected.  When using a paint protection film, a flexible and clear layer of urethane film is applied to your vehicle to act as a barrier protecting the paint from rocks, stones, sand, and bugs.

Factors that influence the price:

  • The size of the car.  The rule of the thumb is that the bigger your car, the more undercoating will be necessary; therefore, your cost will be higher than a smaller car.
  • Location.  The price for car undercoating varies from one region or city to another. Metropolitan areas are known to offer a bit cheaper price since there is more competition.

Tips to know:

  • Contrary to what majority of people believe, undercoating and rust proofing are not exactly the same.  Generally, rust-proofing products are way expensive compared to undercoating.  Rust-proofing includes treating metals with a thin clear coat.
  • It is very important that the undercoating should be done by a professional since it is a delicate job.  If it is not done well, the water drainage holes in the vehicle might clog which will create water accumulation inside, resulting in the metal parts rusting.  To find a professional, it is advisable that you use services such as to get quotes in your area.
  • The undercoating may last for only a year.  No matter how well you take care of it, the undercoating will wear off sooner or later.  Undercoating that is worn and patchy will not do any good for your car since water, salt and other elements can be trapped under the coat which will result to eroding the metal.
  • If you are planning to do the job yourself, cleaning the underside of your car is the most important part.  If it is not completely free of grease and other substances, these will get trapped underneath the undercoating and cause even more damage than you are trying to prevent.

Questions to ask:

  • Is there a need to undercoat a new car?
  • How long will it take for my car to be undercoated?

How can I save money?

  • If you have the skill to do it on your own, you can do the undercoating of your car all by yourself.  You just need to buy a good undercoating product and start the job in your own garage.
  • Look for a shop that does undercoating at a reasonably cheaper price.  Get quotes from several shops and have these compared.  Go for the one that is favorable to your budget yet known to deliver quality work.
  • Consider a third party shop for your undercoat rather than the dealer.  The third party shops usually have more quality work than the dealers since most local shops focus solely on the undercoating.  Not to mention that they charge less than car dealers.


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