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15 oz. Matte Black Rubberized Undercoating Spray

  • Protects metal surfaces from corrosion and moisture
  • Scratch and weather-resistant
  • Can be painted over
  • View More Details
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Product Overview

Rust-Oleum Rubberized Undercoating protects metal surfaces from corrosion and moisture. The finish remains soft and can be painted over. Dries to a flat-black, rubberized finish.
  • Use on bare or primed metal including underbody and wheel wells of cars, trucks, trailers and other recreational vehicles
  • Oil-based formula provides a durable, long-lasting finish, resists nicks and scratches
  • Matte black textured finish
  • 15 oz. can covers up to 18 sq. ft.
  • Any-Angle Spray Technology with comfort tip
  • Clean up with mineral spirits
  • Do not apply to surfaces that exceed 200°F
  • Excellent weather resistance
  • Actual paint colors may vary from on-screen and printer representations
  • California residents

Info & Guides

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Container Size
15 Ounce


Application Method
Base Material
Oil Based
Coating Product Category
Color Family
Flat Black
Coverage Area (sq. ft)
Dry to touch (min.)
Hexadecimal Value
HSL Value
Number per Package
Paint Key Features
No additional features
Paint Product Form
Aerosol Spray
Paint/Stain Clean Up
Mineral Spirits
Paint/Stain/Waterproofer Product Type
RGB Value
Surface Material Use
Time before recoating (hours)

Warranty / Certifications

Manufacturer Warranty
Satisfaction guaranteed for full refund of purchase price

Questions & Answers

Typical questions asked about products:

  • Is the product durable?
  • Is the product easy to use?
  • What are the dimensions of the product?

Customer Reviews

  • 3.3
    out of 42 reviews
  • 52% recommend this product
Filter by:
Showing 1-10 of 42 reviews
Wish it was a bigger can...
Wish it was a bigger can
    Great Product and protect my trailer real good
    • Verified Purchase
    • Recommended
            Was not impressed. After using 3M rubberized undercoating for years,...
            Was not impressed. After using 3M rubberized undercoating for years, I decided to try Rust-Oleums brand. They usually make decent paint products. The spray nozzle on most of the cans I bought wouldn't spray. I had to keep taking the nozzle off the cans and seeing if they were clogged. They weren't. Had to keep "tilting" the nozzles to get some spray out. I had shaken the cans more than enough to get them to spray normally. And i wasn't impressed with the coverage. The substrate was thinner than I was anticipating. It would run and was almost watery. Even after applying several coats, it didn't build up to a thick coating. Live and learn.
            Response from Rust-OleumSupportJun 25, 2021
            Thank you for reaching out. It sounds like the nozzle was clogged. Inside the can is a dip tube that pulls the paint from the bottom of the can to the tip. If the pigment in the paint is too big or if there’s not enough pressure behind it, it can get stuck in the tube or tip and the paint won’t spray. Try turning the can upside down and spraying for a few seconds. If the clog is in the tip, soaking it in mineral spirits should clear it out. If these two tips don’t fix the problem, call us at 877-385-8155 to discuss further. - Rust-Oleum Product Support 1 Rustoleum
            • Verified Purchase
            Rating provided by a verified purchaser...
            Rating provided by a verified purchaser
            • Verified Purchase
            Would be a good product if you could only get it to come out of the can. Unusable until they fix this. Don't buy.
            You can shake the can until your arm falls off and it STILL clogs the nozzle every few seconds. Unusable. Rust-Oleum, you are a good company with generally top quality products... How did this ever get past your quality control? Did nobody even try it and see if it works before making millions of them and sending them out to the stores? Come on, you can fix this!
            Response from Rust-OleumSupportMay 4, 2021
            Oh no, this is not what we like to hear JP. After vigorously shaking Rust-Oleum Automotive Rubberized Undercoating Spray for at least one minute once the mixing ball begins to rattle, and frequently during use, the spray is typically excellent. Give us a call at 866-585-8430 so we can hear more about your application and work to make things right.
            - Rust-Oleum Product Support 6 Rustoleum
              I bought 2 of these first didn't spray well. Grab the second one and that didn't spray good eithe...
              I bought 2 of these first didn't spray well. Grab the second one and that didn't spray good either. Both going back to the store.
              Response from Rust-OleumSupportApr 16, 2021
              That's not what we like to hear! It sounds like there may be a clog inside the nozzle or valve of the Rust-Oleum Rubberized Undercoating Spray. If you'd like, we would be more than happy to assist you if you'd like to have the cans ready and reach us at (800) 481-4785. - Rust-Oleum Product Support 1 Rustoleum
                Showing 1-10 of 42 reviews