The 10 Best Truck Undercoatings

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This wiki has been updated 17 times since it was first published in January of 2019. Maintaining a truck isn't easy, and many don’t realize that the undercarriage is particularly vulnerable to damage from dirt, moisture, and chemicals. Here you’ll find a variety of undercoatings that will create a strong barrier to keep your investment running smoothly. Remember to take the proper safety measures and use protective equipment - like goggles, gloves, and masks - when applying these. When users buy our independently chosen editorial picks, we may earn commissions to help fund the Wiki.

1. Dynatron 544 Dyna-Pro

2. Fluid Film Prevention

3. CRC Brakleen

Editor's Notes

March 21, 2019:

There are different varieties of undercoating options, including those with wax, oil, or asphalt bases. All of these have been incorporated into our list to suit varying consumer tastes and needs. We prioritized strong rubberized coatings since they offer easy application and are reliably durable, but we included alternatives as well, such as POR-15 45404 (which goes on in thin coats like paint) and Fluid Film Prevention, a more eco-friendly option. While all of the selections on our list can be used to protect any automotive vehicle and even boats and RVs, our highest ranking items are especially well suited to trucks, particularly our #1 choice, Dynatron 544 Dyna-Pro, which was engineered by 3M to be exceptionally heavy duty. For those who don't have the option of a spray gun or don't want to deal with a brush, we included multiple choices that come in aerosol cans for convenience. We also added Chemical Guys Bare Bones for users who need adequate protection, but also value the aesthetic of a glossy appearance.

We cannot stress enough to follow proper safety protocols when applying any of the selections on this list - follow the directions on the label and ensure that your solutions are stored in the proper manner, away from heat. Protect yourself with a mask, goggles, and clothing to avoid breathing vapors in or allowing your eyes and bare skin to come into contact with these substances. It's also a good idea to lay down a tarp before beginning, to ensure your floors remain clean, and to carry out your application in a well-ventilated area.

4. POR-15 45404

5. 3M 03584 Professional

6. Wurth High-Build Underseal

7. Rusfre Automotive Black

8. Evercoat 1348 Premium

9. Rust-Oleum Mist

10. Chemical Guys Bare Bones

Gia Vescovi-Chiordi
Last updated by Gia Vescovi-Chiordi

Born in Arizona, Gia is a writer and autodidact who fled the heat of the desert for California, where she enjoys drinking beer, overanalyzing the minutiae of life, and channeling Rick Steves. After arriving in Los Angeles a decade ago, she quickly nabbed a copywriting job at a major clothing company and derived years of editing and proofreading experience from her tenure there, all while sharpening her skills further with myriad freelance projects. In her spare time, she teaches herself French and Italian, has earned an ESL teaching certificate, traveled extensively throughout Europe and the United States, and unashamedly devours television shows and books. The result of these pursuits is expertise in fashion, travel, beauty, literature, textbooks, and pop culture, in addition to whatever obsession consumes her next.

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