- FDC Rust Converter Ultra, Highly Effective Professional Grade Rust Repair Spray (1 Gallon)

Wonderful product, does what it claims. Repairing the rust on my truck especially the underside using a sprayer bottle and a brush to spread it. First went with a scaper to remove loose rust and dirt and did two coats and now it's all black and water repellent. Will not coat the underside with anything else till possibly next year in case I need to do one more treatment as the rust was severe on some areas. I chose to treat it (converting) rather than remove it cause if there's any left, it will come back, it's like cancer. One gallon should be enough and have some left to do the steel rims, calipers, drums and other rusted parts Very grateful for this product, tried many other and this one actually works.

I just spent 3 long days peeling a 20-year-old commercial bedliner spray job on my F-450. Part of it had come loose and the rust was starting to be too much to ignore. Peeling The remainder with hammer, chiselwith and half dozen wheels of paint and rust remover with a grinder. The job absolutely sucked as each morning the entire grinded area was all rusted over again. I use the product over the really bad rust pitted almost through areas and it did such a good job even on the exterior parts that was just bare metal I ended up laying this product over the entire bed before doing a new bedliner rolled over finish. The proof was instant as the next morning there were no rust anywhere. The product does say wait 48 hours and it confirmed the effectiveness against rain and morning dew. I was quoted $1800 to respray a bed liner after I did all the hard work so I ordered the herculiner kit. I like this product so much I went on to use it on top of a 2003 expedition roof and then use the same bedliner finish on top of that roof. I have been to multiple finishing shops charging me thousands of dollars to stop the rushed holes on the old Ford roof and All I did is waste my money with them. This product along with roofing fabric over the holes of rust and the bedliner finish renewed my SUV for another 5 years. Can't beat the naturally aspirated v8s that has been maintained so why you lose a vehicle over rust that now can be taken care of with this phenomenal product. I am now using this chemical in a spray bottle to go underneath my truck and spray the entire frame along with the drive shaft and anything else that looks rusty. Every 6 months I go under the truck with a can of rustoleum rust converter and it's gone within months. This product is for real not just surface garbage. I'm starting to use this as the primer coat on anything that has metal.

Hard to give a complete review as I really would need a few years to see how it goes. I will give a review of my current experience. The shipping was quick and the product was at my house in just a few days. I am restoring a 47 Chevy truck and there is quite a bit of surface rust and pitting. I completely sanded the door down, took a wire wheel to the pitting and finally sandblasted. It came out really nice but there was still some dark color in the deeper pits. I painted this product on with a brush. Almost immediately it turned all of the metal it came in contact with to a dark purple. Once it dried, it was almost black. Give it a day and put on another coat. After a few days I took the DA sander and went over the whole panel again, only leaving the Rust Converter in the pits. I cleaned it all up and did my body filler over top of the RC. Sanded down really nice. At this point I have primed but nothing further. After a few weeks all looks good. I really think the RC is going to help deter the rust from coming back. It is also easily sandable by hand and comes out really smooth, ready to take primer directly on. I'm overall happy with this product so far. But in all honesty, it will need to be painted and in place for a few years before I know it is going to work as expected. Thanks.

Great product

I used this on an old car body that was glass bead blasted and it worked great for me. I applied it uncut with an undercoating gun. It went on pretty good considering the cheap gun I bought because I couldn’t find my old good one. On the inside, it went into places that blasting couldn’t get. It turned purple, and after 4 days, I sprayed epoxy primer over everything and it adhered well. I live in Arizona where the humidity is very low, so consider your humidity levels, you don’t want to trap moisture between your metal and this stuff. This stuff is good for existing rust, not so much for preventing rust from trapped moisture, or your finger prints.

I had the surface of 3 large PCs of farm equipment and 2 trailers, 12ft & 26ft, professionally blasted to bare metal this surface rusted nicely in the next 48hrs from Florida rainy season humidity and rain. I tried brushing 1st but was too slow,doing 2 coats. I'd do one ft ft section,then go back over it B4 going to the next section. It looked all black and good,,till the next day when it dried. It dried very transparent and looked rust still thru the thin black,even tho it was shiny,wet black when applied. I wasn't happy with this because I didn't untent in painting over it,and spending 2x more money for metal\rust paint! So in a last ditch effort I put the product in my harbor freight cheapest automotive spray gun at 20psi air pressure,,applied a 3rd and 4th nicely even coat of the material on my equipment. In the trailer I tried applied the material too heavily with a squirt bottle and used a sponge to smooth it out. No application method produced a nice finish on the 1st application. Once it dried I tested a 3rd coat just wiping a small area in the trailer ,,and that turned out quite nicely. Just a heads up in case you see sales pics from these distributors showing B4 and after pics ..it can be achieved,but only after letting the 1st 1-2coats dry fully over night,,and application of a second coat,calling that to dry overnight. That's a problem here in Florida because it rains often . We used plastic tarps to protect it.and worked out well. See photos

works well ,a little goes a long way . I shortened the drying time with a heat gun.

My 2014 Tacoma was developing some rust spots underneath, so I tried this rust converter. It worked amazing well! It looks like milk and does not have any nasty odor. I simply brushed it liberally on the rusty spots on the undercarriage, and within a day or two I noticed the rust was gone. No scraping or sanding required. I also did not bother painting over it afterward as the rust was all surface level and this really took care of it. Unfortunately, I only used about 1 quart of the stuff so I have a ton left over... if it came in a smaller container option that would be great. But still, for the price it worked great and took care of the problem, so I highly recommend.

it was eating through the paint even after letting it set for three days.

Great value for the money and it does exactly what it says on the tin. I will definitely buy this again.