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12 oz. Flat Dark Gray Automotive Primer Spray

  • Prep vehicle surfaces for top coat with a heavy duty base coat
  • Wet sandable primer, durable for interior/exterior use
  • Fast dry auto spray paint covers up to 12 sq. ft. per can
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Product Overview

The Rust-Oleum Stops Rust 12 oz. Matte Dark Gray Automotive Primer Spray has a fast-drying, rust-preventative formula. Suitable for use on a variety of materials except-galvanized metals, this primer spray has both indoor and outdoor durability. Featuring a dark-gray color, this primer spray works well under most automotive paints. To use, spray on and wait 15 minutes before applying a top coat or wet sand to achieve an ultra-smooth finish.
  • Fast-drying formula can be top-coated or wet-sanded to an ultra-smooth finish in just 15 minutes
  • Applies easily to indoor and outdoor metal, wood, concrete and masonry
  • Dries in approximately 120 minutes
  • Coverage approximately up to 15 sq. ft. depending on surface porosity
  • Stops Rust features a comfort tip with a wider finger pad to reduce fatigue caused by continuous spraying and any-angle spray feature that allows you to spray in any direction, even upside down
  • Primer
  • Superior rust prevention which provides lasting protection and beauty for projects
  • Actual paint colors may vary from on-screen and printer representations
  • California residents

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12 oz. Flat Dark Gray Automotive Primer Spray
BrandRust-Oleum Stops RustRust-Oleum Stops RustRust-Oleum AutomotiveRust-Oleum Stops Rust
Name12 oz. Flat White Clean Metal Primer Spray12 oz. Flat Rusty Metal Primer Spray12 oz. Self Etching Dark Green Primer Spray12 oz. Flat Dark Gray Automotive Primer Spray
Paint/Stain/Waterproofer Product TypePrimerPrimerPrimerPrimer
Primer PurposeColor Changing,Rust-ResistantRust-ResistantColor ChangingColor Changing
Container Size12 Ounce12 Ounce12 Ounce12 Ounce
Surface Material UseBrick,Concrete,Masonry,Stone,WoodMetalFiberglass,WoodBrick,Concrete,Masonry,Metal,Stone,Wood
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Container Size
12 Ounce


Base Material
Oil Based
Coating Product Category
Color Family
Dark Gray
Coverage Area (sq. ft)
Dry to touch (min.)
Number per Package
Paint Key Features
Rust Preventative
Paint Product Form
Aerosol Spray
Paint/Stain Clean Up
Mineral Spirits
Paint/Stain/Waterproofer Product Type
Primer Purpose
Color Changing
Surface Material Use

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
    out of 3 reviews
  • 33%recommend this product
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Showing 1-3 of 3 reviews
The spray pattern coming out of the nozzle is poor leading to a lot of wasted paint. Most of the...
The spray pattern coming out of the nozzle is poor leading to a lot of wasted paint. Most of the it goes spraying off in directions other than where you are aiming. A flat "fan" pattern would work much better. The other thing is the spring pressure on the nozzle is too strong. After 20 seconds your finger is aching from having to hold the nozzle down. This leads to difficulty being accurate, and once again, a lot of waste. I must say I don't understand why these companies, who do nothing except make paint, change stuff around only to make things worse. Why not just leave what works alone?
Response from Rust-OleumSupportOct 1, 2019
We understand your frustration. Rust-Oleum nozzles, including Rust-Oleum Stops Rust Automotive Primer, all have a specific type of nozzle to optimize performance. For best results, hold the can upright 10 to 16 inches from the surface and spray in a steady back-and-forth motion, slightly overlapping each stroke. Keep the can the same distance from the surface and in motion while spraying. To help with finger fatigue, you can use a Rust-Oleum Comfort Grip.

https://www.homedepot.com/p/Rust-Oleum-Stops-Rust-High-Performance-Comfort-Spray-Grip-Accessory-241526/100670383 - Rust-Oleum Product Support 5 Rustoleum
    1 person found this helpful
    you always get the thumbs down when you go againts the grain, but this was horrible for the wood ...
    you always get the thumbs down when you go againts the grain, but this was horrible for the wood application that I used this on. ( it does say you can use on wood), but it dried like rubber. I let this set for about 6 hours, but it would not hold on the wood and wrinkled up when I wemt to sand it. I have worked in the autobody field for many years, and never had this issue. Maybe it works better on metal, but for would I say stay away. This is coming from someone that uses rustoleum products very often.
    Response from Rust-OleumSupportAug 18, 2017
    Thank you for sharing your experience. Rust-Oleum Stops Rust Automobile Primer Spray should be recoated within 1 hour of the previous coat or after 48 hours has passed. If you recoat before the first application of paint has skinned over and begun to dry to the touch, the two coats will dry correctly. However, if recoated at the wrong time, it may wrinkle blister or crack, which sounds like what you are experiencing. Simply put, to apply a second coat, the first coat must be very dry or very wet - never in between. To fix this, try sanding the surface, wait 24 hours, and apply again. Rustoleum
    3 people found this helpful
    Best spray primer for price!
    I've been using this all summer on metal and epoxy filler as well as old paint. With multiple thin coats the results are fantastic. Fills nicely and dries smooth. Will buildup if oversprayed, but sands easily. Good adhesion on multiple surfaces.
      • Recommended
      3 people found this helpful
      Showing 1-3 of 3 reviews