--- product_id: 20090799 title: "Rust-Oleum 249340 Automotive 12-Ounce High Heat Primer Spray Paint, Gray" brand: "rust-oleum" price: "$31.20" currency: USD in_stock: true reviews_count: 13 category: "Rust Oleum" url: https://www.desertcart.us/products/20090799-rust-oleum-249340-automotive-12-ounce-high-heat-primer-spray store_origin: US region: United States of America --- # Covers 12 sq ft per can Heat resistant up to 2000°F Rust-resistant oil-based formula Rust-Oleum 249340 Automotive 12-Ounce High Heat Primer Spray Paint, Gray **Brand:** rust-oleum **Price:** $31.20 **Availability:** ✅ In Stock ## Summary > 🔥 Prime like a pro — protect your ride with heat-defying precision! ## Quick Answers - **What is this?** Rust-Oleum 249340 Automotive 12-Ounce High Heat Primer Spray Paint, Gray by rust-oleum - **How much does it cost?** $31.20 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/20090799-rust-oleum-249340-automotive-12-ounce-high-heat-primer-spray) ## Best For - rust-oleum enthusiasts ## Why This Product - Trusted rust-oleum brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Rust-Stop Power:** Oil-based primer with a proven Stops Rust formula to shield your investment from corrosion. - • **Precision Coverage:** One 12-ounce can covers up to 12 sq ft with a fast-drying matte finish ready for topcoats in just 1 hour. - • **Any-Angle Spray Tech:** Spray confidently from any direction—even upside down—for flawless, professional application every time. - • **Extreme Heat Defense:** Protects metal surfaces from scorching temperatures up to 2000°F, perfect for engines and exhausts. - • **Engineered for Longevity:** Specially formulated for automotive metal surfaces, ensuring superior adhesion and durability under extreme conditions. ## Overview Rust-Oleum 249340 Automotive 12-Ounce High Heat Primer Spray Paint is a matte gray, oil-based primer designed for metal automotive parts exposed to extreme heat up to 2000°F. It offers rust-resistant protection, covers up to 12 sq ft per can, dries to touch in 30 minutes, and can be topcoated within an hour. Featuring any-angle spray technology, it ensures easy application on engines, mufflers, and exhaust components, delivering a durable base coat that extends the life and look of your vehicle. ## Description Product Description Rustoleum Automotive 249410 12 Oz Engine Primer Spray Paint, Gray Features: 12 oz spray paint Resists heat up to 500°F Perfect for using on automotive engines and other automotive surfaces Specifically formulated to prevent and stop rust Any angle spray comfort tip Gray. From the Manufacturer Rust-Oleum High Heat Primer bonds to bare metal and helps create a smooth top coat finish. Review: Good product if you are willing to take the time to do it right. - Works very well when certain common sense best practices are followed. Clean the part thoroughly, that means basic and acid washes beforehand, rough up surface (I used 60 grit) where applicable. Once clean always hold part with hanger or clean non-powdered gloves, after first coat, the same precaution needs to be adhered to. Coats should be thin and consistent. Ideally I would not move forward to final color coats with anything less than two complete prime coats. Part of the reason I coated my exhaust is that I am moving to a winter salt state, soooooo yeah, coat it or watch it rust into oblivion. I tend to go overboard on everything, so the whole system has 4-6 coats of primer depending on location and base metal, with 1-3 curing cycles (where possible), prior to color coats. Coverage is actually pretty good. After the priming process I sanded again after curing but prior to final color coat. I used black, but I imagine most colors (which are in no way true to color expectations or vibrancy... this stuff isn't jet-hot) will hold up the same depending on application and part cleanliness throughout the process. If applied and cured properly I see no reason why flaking, delamination, or "chipping" should be too much of an issue within reason. I'm a year into this job and as of my last oil change, I was able to fully inspect my work and found none of the above. I am happy with the product so far and it worth noting, this is NOT a thermal coating, it is purely protective.... and i suppose aesthetic for some. Time consuming to do right, but if the purpose is to protect your investment, well, take the time and do it right. Can you just go to town on an exhaust part and throw it on the car? Sure. Will it be as durable? Probably not. Take all of this as you will. Review: Good primer! - Good primer! Covers well with good consistency. Rated for high temperatures but I use it for everything. ## Features - High heat primer spray paint is designed for use on metal surfaces such as automotive engines, mufflers and more - Oil based paint with Stops Rust formula provides rust resistant base coat for cars, trucks and other vehicles - Covers up to 12 sq ft, dries to the touch in 30 minutes and can be topcoated in 1 hour - Spray paint offers outstanding heat resistance for metal surfaces up to 2000°F - Flat finish can be covered with any topcoat with superior adhesion - Specially formulated to prevent rust and is recommended for use on automotive engines and other metal surfaces which reach intermittent temperatures up to 2000°F (1093°C). - Ideal for mufflers, head pipes and engine blocks - For best appearance, top coat with Rust-Oleum High Heat Paint - Any-angle spray technology allows the can to be sprayed in any direction, even upside down ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B003CT499O | | Age Range Description | Adult | | Best Sellers Rank | #3,996 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #35 in Spray Paint | | Brand | Rust-Oleum | | Brand Name | Rust-Oleum | | Color | Gray | | Color Code | 000000 | | Container Type | aerosol can | | Coverage | see package | | Customer Reviews | 4.8 out of 5 stars 3,660 Reviews | | Finish Type | Matte | | Full Cure Time | 1 Hours | | Global Trade Identification Number | 00020066188771 | | Included Components | Rust-Oleum 249340 Automotive 12-Ounce High Heat Primer Spray Paint, Gray | | Indoor Outdoor Usage | Indoor | | Is Waterproof | False | | Item Form | Aerosol | | Item Type Name | High Heat Primer Spray Paint | | Item Volume | 354.88 Milliliters | | Item Weight | 340 Grams | | Manufacturer | Rust-Oleum | | Model Name | Automotive | | Model Number | 249340 | | Paint Type | Spray | | Part Number | 249340 | | Size | 12 Ounce (Pack of 1) | | Special Feature | Rust Resistant | | Special Features | Rust Resistant | | Specific Uses For Product | Interior/Exterior | | Surface Recommendation | Metal | | UPC | 020066188771 | | Unit Count | 12.0 Ounce | | Warranty Description | Satisfaction Guaranteed | ## Product Details - **Brand:** Rust-Oleum - **Color:** Gray - **Finish Type:** Matte - **Item Volume:** 354.88 Milliliters - **Paint Type:** Spray - **Size:** 12 Ounce (Pack of 1) - **Special Feature:** Rust Resistant - **Specific Uses For Product:** Interior/Exterior - **Surface Recommendation:** Metal - **Unit Count:** 12.0 Ounce ## Images ![Rust-Oleum 249340 Automotive 12-Ounce High Heat Primer Spray Paint, Gray - Image 1](https://m.media-amazon.com/images/I/71fnHaSt7rL.jpg) ## Available Options This product comes in different **Size** options. ## Questions & Answers **Q: Can I paint my pots and pans with this? Re-doing kitchen and would like to not have to buy all new pots and pans.** A: Seriously, please do not do that. That would be extremely harmful for you and whomever else you cook for. **Q: Can I paint now and put the parts aside, then do the curing process later, after my engine is back in service?** A: do a light paint now, let it dry then paint again for better results. **Q: How high of temp can it sustain? says intermittent up to 2000°f. kinda ambiguous. can it do 1600f for 1hour?** A: i used this product on my 4 pistion calipers and tested them at my campus garage, i tested it under constant and heavy braking, it withstood temps up too 1989F. The red paint i used has been on there for 3 years and i still havent had to touch up the paint **Q: Does this contain zinc to work as a good primer for aluminum?** A: Not sure this answers your question but I can tell you from experience that this stuff really works. I used it on my aluminum engine top side and it's been 2yrs and my engine paint still look new to date. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Good product if you are willing to take the time to do it right. *by B***T on December 16, 2017* Works very well when certain common sense best practices are followed. Clean the part thoroughly, that means basic and acid washes beforehand, rough up surface (I used 60 grit) where applicable. Once clean always hold part with hanger or clean non-powdered gloves, after first coat, the same precaution needs to be adhered to. Coats should be thin and consistent. Ideally I would not move forward to final color coats with anything less than two complete prime coats. Part of the reason I coated my exhaust is that I am moving to a winter salt state, soooooo yeah, coat it or watch it rust into oblivion. I tend to go overboard on everything, so the whole system has 4-6 coats of primer depending on location and base metal, with 1-3 curing cycles (where possible), prior to color coats. Coverage is actually pretty good. After the priming process I sanded again after curing but prior to final color coat. I used black, but I imagine most colors (which are in no way true to color expectations or vibrancy... this stuff isn't jet-hot) will hold up the same depending on application and part cleanliness throughout the process. If applied and cured properly I see no reason why flaking, delamination, or "chipping" should be too much of an issue within reason. I'm a year into this job and as of my last oil change, I was able to fully inspect my work and found none of the above. I am happy with the product so far and it worth noting, this is NOT a thermal coating, it is purely protective.... and i suppose aesthetic for some. Time consuming to do right, but if the purpose is to protect your investment, well, take the time and do it right. Can you just go to town on an exhaust part and throw it on the car? Sure. Will it be as durable? Probably not. Take all of this as you will. ### ⭐⭐⭐⭐⭐ Good primer! *by S***B on March 7, 2026* Good primer! Covers well with good consistency. Rated for high temperatures but I use it for everything. ### ⭐⭐⭐⭐⭐ Works well *by S***R on May 14, 2026* Good stuff ## Frequently Bought Together - Rust-Oleum 249340 Automotive High Heat Primer Spray Paint, 12 Ounce (Pack of 1), Gray - Rust-Oleum 248903 Automotive High Heat Spray Paint, 12 oz, Flat Black - Rust-Oleum 251591 Caliper Spray Paint, 12 oz, Red --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.us/products/20090799-rust-oleum-249340-automotive-12-ounce-high-heat-primer-spray](https://www.desertcart.us/products/20090799-rust-oleum-249340-automotive-12-ounce-high-heat-primer-spray) --- *Product available on Desertcart United States of America* *Store origin: US* *Last updated: 2026-07-06*