Best Undercoat Paint – Detailed Review 2021

Choosing the right undercoat paint for your truck is one of the best things you can do for your truck. Before you start comparing the products, you have to make sure of the requirements. You will want to pick something appropriate for the surface you are going to paint. In this article, we have listed some of the best undercoat paints you can find in the market. These products have been tested by our team and the reviews are based on the findings from these tests.

1. 3M 03584 Professional Grade Rubberized Undercoating

3M 03584 Professional Grade Rubberized Undercoating

One of the best options for use on truck surfaces, the 3M 03584 Professional Grade Rubberized Undercoating, can be used on any kind of metallic surfaces. It prevents corrosion and creates a smooth surface for the next layer of paint.


  • It can be used in trucks, vans, cars, and RVs.
  • It protects your vehicle from rust, dust, abrasions, and corrosions.
  • It has aerosol dispenser which lets users apply the paint conveniently

Price: $48.98 

2. Rust Oleum Automotive 254864

Rust Oleum Automotive 254864

When it comes to undercoat paints, Rust Oleum has one of the best in the market. The unique paint formula makes it suitable for use on trucks, cars, and RVs. You can get this product from Amazon at a very affordable price.


  • It offers a back protective coating.
  • It provides protection to metal surfaces against moisture and corrosion.
  • It has a distinct rust prevention formula for protection against rust on vehicles.

Price: $20.95 (15 oz)

3. POR-15 45404 Semi-Gloss Black Rust Preventive Paint

POR-15 45404

This is one of the best products to use for undercoating your truck. Besides its use as an undercoating for your vehicle, you can use it as a protective paint on various other surfaces. 


  • It doesn’t require rust-removal before applying.
  • It is completely lead-free.
  • It works on any kind of metal surface.

Price: $41.33 (1 quart)

4. Dynatron 544 Dyna-Pro

3M Dynatron Dyna-Pro

The Dynatron 544 Dyna-Pro is one of the best rubberized undercoating paints you can find in the market. It is made for durability and it wouldn’t be an overstatement to say that it is one of the best options you can find for undercoating your vehicle. 


  • It can be used as resistant against weathering, salt spray, dust and chipping.
  • It gives you the desired OEM paint finish.
  • It works as an electromechanical barrier against rust and dust.

Price: $110 (1 gallon)

5. Rusfre Undercoat Paint

Rusfre Automotive Black

If you are looking for a cheaper yet high-quality option, this is the one to go for. With this undercoat, you can get a superior rubberized layer that has bound fibers for a firmer grip and a better hold. 


  • It has chip-resistant bound fibers.
  • It contains a rubberized layer for holding the materials together.
  • It reduces the sound coming into the cabin from the engine and the road.

Price: $30 (1 gallon)

Truck Undercoatings