7 Best Undercoating For Trucks – Buyer’s Guide & Reviews

Bearing in mind that your truck’s undercarriage comes into contact with substances such as chemicals, water, and other debris and dirt from the road. When you use the best undercoating for trucks, you are going to preserve the value of your car.
Your vehicle is subject to corrosion, but if you undercoat or rust proof it, you will definitely protect it corrosion and rust. What you should realize is that, even if you are not driving your vehicle on particular rough terrains, things like rocks, dirt, road debris, and salt can end up under the carriage of your vehicle and cause a lot of wear and tear.

Comparison Of Truck Undercoating



1. 3M 03584 Rubberized Undercoating

3M 03584 Professional Grade Rubberized Undercoating - 16 oz. - Case of 6

2. Fluid Film 1 Gallon Can Rust Coating Undercoating

Fluid Film 1 Gallon Can Rust Inhibitor Rust Prevention Anti Corrosion Anti Rust Coating Undercoating Underbody Rust Proofing Corrosion Protection for Truck Snow Blower Mower Car Semi Tractor Bus

3. Dynatron 544 Rubberized Undercoating Can

Dynatron 544 Dyna-Pro Paintable Rubberized Undercoating Can, 120 oz, Gallon Can

4. Rust-Oleum Undercoating Spray Paint Black Rubberized

Rust-Oleum 15 Oz Black Rubberized Undercoating Spray Paint, Black, 6 Pack

5. Automotive Spray-on Undercoating Material – Rubberized 1020F6

Automotive Spray-On Rubberized Undercoating Material, 1-Gallon RUS-1020F6

6. Bondo 737 Undercoat Aerosol that is Rubberized

Bondo 737 Rubberized Undercoat Aerosol - 18 oz. (Pack of 6)

7. Permatex 81833 Heavy Duty Rubberized Undercoating

Permatex 81833-12PK Heavy Duty Rubberized Undercoating, 16 oz. Aerosol Can (Pack of 12)

Complete Truck Undercoating  Reviews

1. 3M 03584 Rubberized Undercoating

It might one of the easy to apply rubberized undercoating, providing a black protective coating which does not come out easily after application. It provides anti-corrosive protection, insulating and sounds deadening to trucks, cars and another type of vehicles. 


  • Can be used on trucks, cars and various recreational vehicles.
  • It is a black protective coating that helps in preventing damage caused by corrosion.
  • Road noise reduced due to sound deadening properties.
  • Clean application due to no-run formula
  • It is a quality undercoat


  • Good for summer application, but in winter, it comes out
  • It is overpriced

2. Fluid Film 1 Gallon Can Rust Coating Undercoating

It comes at a great price. I bought it for my truck’s undercarriage spray. I did it during winter and came out great. After the application on my truck, I read some negative reviews on Amazon that stated that rain brings out the fluid film.

I tend to disapprove the review since, I have spent some quality time on the roads during snow time, including driving on highways known to have 95 percent salt and snow and my undercoat is still intact.

I have been using my truck for over three months now and driven it in some of the toughest weather scenarios. 


  • It is great for trucks and cars.
  • It is a lubricant that prevents rust.
  • It is great for snow due to its anti-freezing agents.
  • Long lasting, solvent-free and doesn’t dry out.
  • It is lanolin base and thus environmentally friendly.


  • Poorly designed packaging.
  • Too thick

3. Dynatron 544 Rubberized Undercoating Can

It is a rubberized undercoating which forms a durable barrier against chipping, weather, salt spray, and rust. Applying it is likened to applying a layer of rubber to an auto undercarriage that is vulnerable.

It dries faster and the coating combines with easy spray or brushes application to leave the undercarriage with a superior sealing and corrosion resistance. It can match various types of undercarriage colors. It is flexible and durable and applicable to all types of vehicles.

You can use a spray gun or a brush when applying. It resists chipping and in the process, forms an electromechanical bond that offers a tight barrier against rust and other corrosions that are dangerous for your truck undercarriage and other areas with bear metals and other components that are susceptible to salt and weather.


  • The coating is of a flexible rubberized that resist weathering, chipping, salt spray, and dust.
  • It forms an electromechanical barrier that limits comebacks and against rust.
  • Fully textured and paintable to match your paint finishes of the truck for great satisfaction.
  • It is like applying rubber to areas exposed to wear and weather.
  • It is to apply and stays tough


  • It is expensive
  • You have to use the gun instead of spray cans for it to cover best.

4. Rust-Oleum Undercoating Spray Paint Black Rubberized

If you decide to purchase this product, then it is best you know that it can withstand high temperatures without flaking or chipping. It is a rubberized undercoating which will bring protection that might be reliable to the engine and undercarriage of your truck. Its application temperature is between 50 and 90 degrees. For it to dry, it takes roughly between one and two hours after you are done with the application. A 15oz can provide for between 5 to 10 square feet of application if you are using the spray method.


  • It can clean up using mineral spirits.
  • It has a matte black textured finish.
  • It has excellent weather resistance.
  • Dries very fast
  • Can be applied on the undercarriage, primed or bare metal and wheels of trucks, cars, and other vehicle types


  • Health warning on cancer and reproductive harm.
  • Not a high-quality product

5. Automotive Spray-on Undercoating Material – Rubberized 1020F6

It is an effective rubberized and formulated with chemicals that are effective in preventing rust. For bonding to prevent cracking, chipping, and peeling, it contains bound fibers. To bring out good results, you will need to spray evenly, and that way, it will cover the undercarriage effectively and provide sound deadening so that, there will be noise as you drive around.

It will bring a barrier between the elements and the undercarriage of your vehicle. It is a rubberized chemical formula which effectively prevents rusting as it provides excellent adhesion to paint and unpainted surfaces.

If you have an automobile, which has been newly repaired, you can use it to prevent dust prevention. If you use a spray gun, it will help you spread the paint evenly. It stays soft to touch while preventing drying out. It doesn’t contain asbestos


  • Sound Deadening.
  • It contains no asbestos.
  • It is available in black only.
  • It is reinforced fibers that have rust inhibitors.
  • It is high quality if sprayed at room temperature or higher as long as you stir and shake well before you use it.


  • A lot of preparation time before application.
  • Comes in one color only – black

6. Bondo 737 Undercoat Aerosol that is Rubberized

It forms a black liquid which will then give your undercarriage a textured finish which resists abrasion, chipping, exterior or weathering. When applying, provides one coat build up with no sagging or running. You only need one coat and your wheels will be sealed together with your undercarriage, gutters, and roofs.

You can apply it to the undercarriage of recreational vehicles, vans, trucks, and cars to protect them from abrasion and corrosion. You can use it also to protect the wheel wells, interior sides, quarter panels, the interior side of the fenders, the underside of hoods, door skins, floor pans, trunk lids, and many more applications.

It also helps to deaden noises and thus, allowing you to have a more quiet and pleasant ride. It might be the long-lasting protection you are looking for your undercarriage.


  • Made in the USA
  • Asphalt-based
  • It is non-paintable.
  • It offers sound deadening properties.
  • It gives a textured finish that resists abrasion, chipping, exterior rusting and weathering.
  • You only need to apply one coat.


  • It cannot be applied to the frame as it doesn’t stick.
  • It takes forever to dry

7. Permatex 81833 Heavy Duty Rubberized Undercoating

If you decide that this is the undercoat you want to buy, then it is best you know that it is easy to use and it is available in black, giving your undercoat a protective black coating. You can use it to protect your weld joints, wheel wells, frames, gas tanks, floor pans, doors, and quarter panels. It offers protection that is solid plus corrosion and moisture resistance.


  • It is corrosion and moisture resistance.
  • It is a black rubberized undercoat.
  • It provides protection for gas tanks, wheel wells, weld joints, frames, and undercarriage.
  • It is ideal for both shop and home use.
  • It is rubberized for maximum durability.


  • Available in black color only.
  • It takes longer to dry

There are several things to consider before you decide which undercoat is the best for your vehicle like knowing the different types available in the market and other factors which includes:

Undercarriage Spray Formulas

There are various undercarriage sprays and different variety of products which are made using a variety of ingredients. The three main products which you will come across include:

1. Water and Paraffin Based

If you decide to pick a water and paraffin based undercarriage spray, you will readily get it at a local automotive store or on Amazon. You will find them easy to apply and their drying time is very fast. The cons are that it is quite thin and you will have to apply several coats in order to provide your undercarriage with a thick barrier. Apart from providing two layers of coat, after a few months, you will need to reapply it again.

If you are lucky, you might find a paraffin based one that is a bit stronger than the average water-based ones, the ones that use paraffin. They can come with paint-on formula or an aerosol formula. They are a bit longer lasting as compared to water-based but still, you will have to re-apply it within the year after the first application.

2. Asphalt Based Undercarriage Sprays

Many of the top sprays you will find in the market are asphalt based. It is an undercoating spray which will seal holes and cracks and really create a barrier that is very powerful for your truck undercarriage.

They will only turn out to be the best for you if you are using your spray on the undercarriage of your vehicle. Why so? It is due to the fact that, asphalt-based products tend to be unpaintable once they dry, which shouldn’t be an issue if you are only applying it to your undercarriage.

But if you are planning to use the spray later on other areas of your vehicles or a different metal, then it might prove to be a problem. If you are looking for a long lasting paint, then you will need to get this particular type for your undercarriage and apart from using it on cars and trucks, you can utilize it on military and all-terrain vehicles. If you have a vehicle that sees heavy road use, then it is might be the best option.

3. Petroleum and Rubber Based

If your choice is the petroleum-based undercarriage spray, then it is important to know that, they are made with oil, making them one of the greatest options if you are looking for an undercarriage spray to protect your truck from salt and also if you reside in an area with a lot of snow.

It also seems to be great at repelling water than the water and paraffin sprays. You will find them being used at professional automobile shops and application to new vehicles when you purchase them. You can easily find them available online at Amazon or at a local shop in the form of paint-on or spray formulas.

Undercarriage Spray Consistency

Your undercarriage spray consistency can determine how easy it is to apply or not. So if you want to use it at home, you will want to get an undercarriage spray that will be easier to use when attempting to protect your track undercarriage. You will have to consider three different features before you decide which one will be the best for you:

1. Consistency

You will need to purchase an undercarriage spray which is able to dry hard enough to protect your truck and at the same time, provide a barrier that is durable between the harsh elements and your undercarriage. If that is the case, you are sure that it is going to protect your undercarriage from debris and rocks.

You will need to ensure that, the spray is pliable enough so that, the other moving parts of your truck undercarriage are accessible. In case you will need some repairs for your vehicle, it should be easier for the mechanic to access it and that the spray on your undercarriage doesn’t provide a barrier that is too thick.

2. Thickness

The consistency and thickness of the undercarriage spray go hand in hand. You will need to keep this mind as you apply the spray physically. You need to know how many coats of the undercoating spray you are purchasing you will need to apply.

The best will be one that you will only need to apply one coat or a medium thickness undercarriage spray because you will know that, the layer formed is not too thin; if not, there is a possibility of your truck being exposed to the dangers of salt and rust damage.

And if the product is too thin, you will be forced to apply several coats which will still leave the undercarriage susceptible in various spots and the application will be tough for you.

3. Drying Time

When looking out for the best formula in your undercarriage spray, drying time is an important feature to consider. If it dries faster, then I would recommend you go for that one. When you get an undercarriage spray which doesn’t dry fast, you could accidentally allow your truck to be exposed to the elements before it is completely dry thereby putting your vehicle at risk.


When you have a quality undercoat for your truck, you will rest assured that, your truck’s undercarriage is protected from the harsh elements, it is exposed to on a day to day basis, thereby elongating its lifespan. Whether you are going with your vehicle to great outdoors or you just want to protect it for the sake of, getting the best undercoating for your truck is the best thing to do.

Ensure that, you buy an undercoating spray which will work for your needs. Remember that, not all undercoating sprays are created the same. If you find one that is powerful and with the features that work for you, it will be great for you. Start with my top 7 best undercoating for trucks list I have reviewed and found if one appeal for you, if not, then proceed to Amazon for a variety of products.

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