Best Rust Converters of 2025

"After struggling to remove rust from my F-450, I found this product. It worked wonders even on severely rusted areas. I applied it over bare metal, and the next morning, there was no rust at all. I even used it on my SUV roof, and it saved me from expensive repairs. I highly recommend it for rust issues."

"I’ve been using this rust converter for years. It truly stops rust without needing a topcoat for several years. I love that it's water-based and easy to apply. It transforms rust into a hard black coating that protects effectively."

"I tried this product on my truck frame, and it worked great. After letting it cure for a week, all the rust was gone. It’s an affordable way to protect my investment compared to other options. I’m really pleased with the results."

"I had some metal doors with significant rust, and this product completely sealed the metal. The surface is paintable, and while it doesn't create a smooth finish, it stopped the rusting and looks much better. I just wish it came in more colors."

"I've been using this product for over 25 years to slow rust progression on my cars. Living in Minnesota, where road salt is common, I've applied multiple coats every fall. It doesn't eliminate rust completely but has been very successful in slowing it down, keeping my cars intact."

"I'm a massive fan of Loctite products. My machine shop relies on their reliability. I used this rust neutralizer on a rusted rifle barrel and was amazed at the results. After a few applications, the rust wiped off, leaving a smooth, shiny surface. Just be patient for the best results!"

"I had several rust spots on my car roof, likely from gravel trucks. This product helped convert those spots into a paintable surface, and I was able to touch them up nicely. I'm really pleased with the outcome, although I wish I could have bought a smaller container since I only needed a little."

"This stuff is absolutely awesome! It converts rusty metal into something easy to work with and paintable. I'm an extremely satisfied customer and I highly recommend this seller and their products."

"I found this to be a very good product that covers extremely well. It was exactly as described, and I was pleased with how it looked after application."

"As a first-time user, I felt the product sprayed on well and I'm hopeful it will help with my rust issues here on the east coast, especially with all the salt!"

"I've been pleasantly surprised by how well this product works on my Freightliner chassis and tow gear. It's easy to use and clean up since it's water-based. I followed the directions and achieved a durable black finish that looks great. I plan to buy more!"

"So far, I am very impressed! I remember using a similar product years ago, and this one seems just as effective. It applies easily and is environmentally friendly. Just be careful not to pour unused material back into the original container to avoid contamination. A little goes a long way!"

"This product has worked great for my rusty Jeep. It goes on easily and starts turning black quickly after application. However, it's a bit runny, so I recommend using a sponge-tip brush instead of a spray bottle. Overall, I'm pleased with the results!"

"This Rust-Oleum spray is a lifesaver! It works like magic to stop rust and seals surfaces perfectly. The flat black finish looks great and blends seamlessly with automotive parts. It's super easy to use with excellent coverage. I highly recommend it for anyone dealing with rust issues!"

"I applied this to my rusted floor pan on my 1974 VW Beetle. After sanding, I used two coats of this rustproof sealer. It dries quickly and has a matte finish, which is perfect since I don't plan to install floor carpet. It looks great, and I highly recommend it!"

"I used this product to undercoat my Jeep Wrangler. It worked well, but I did miss some spots. I bought two cans, but one was more than enough for the entire undercarriage."

"I've used this product before, and I knew it worked well. However, I was disappointed to find that the bottle had about two inches of liquid missing compared to the image."

"I was hopeful after reading the reviews, but unfortunately, it didn't work for me. It was also really hard to remove the chalky residue before I could coat the metal parts with something else. I wouldn’t recommend it."

"I've been using it for a while now, and I'm on my second gallon. It does a fantastic job of converting rust, and I appreciate that it has no harsh smell."

"I've been using this product for years, and it works great! I just brush it on, and rust disappears."

"After reading reviews, I decided to try it. The first coat turns bright orange, and the second coat turns black—it's absolutely amazing!"

"I used Gempler's rust converter on steel containers. It was easy to use and clean up after. The results were fantastic, and the paint is sticking well!"

"This product works wonders on rusted metal. After one year, my headlight housing is still rust-free."

"I'm currently restoring a very rusty UTV. I just sprayed the floor pans today and got great coverage with a nice black matte finish, just as described. I’ve already ordered more!"

"I've been using this on my 69 Vette restoration. After wire wheeling the part and wiping it with acetone, I spray this product, and it looks like new. Adding a top coat makes it perfect!"

"I highly recommend this product! I do a lot of welding jobs on various frames, and this has become my new favorite for the money. It's great, and I love how it turns black and seals everything when I brush it on."

"I really like this product! I used it on my 2001 Honda undercarriage, and it did an awesome job. It leaves a professional finish and creates a protective film that prevents further rusting."

"I was searching for Rust Converter - Ultra, a product I've previously used, but ended up with Rust Converter - Easy 2HD made in China. The packaging was almost identical, and I felt a bit duped by this knockoff. The label also lacked important information."