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

Seems to work well. Sprays pretty well.

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.

Works well on vehicle frames and axles looks black in sunlight and normal lighting but shine a spot light on it and it turns clear which is dark brown when it’s over rust. How often do you shine a 10000 lumen light at the undercarriage of your vehicle though lol. It works when left unpainted over for some reason if you paint over it even after waiting for it to cure the rust eats right back through with a week. Haven’t figured that one out something to do with chemicals or oxygen I don’t know. The nice thing about it is if you get it on a surface that doesn’t have rust on it it’ll dry clear and then wash off that surface when it rains which makes prep practically nonexistent. I still wouldn’t get it on my paint if I can help it. You don’t want to sand to bare metal either it won’t work it needs rust to react to. It’s a chemical not a paint. Just sand it down to surface rust and ably.

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.

Wear rubber/nitrile gloves, you'll need them. Having a fine nap paint pad may be handy if you don't have tons of gloves. Product is thin and coverage is excellent. Thin yet somehow viscous enough to not drip a lot. Applied with brush on rusty OME leaf springs. Everywhere that factory finished remained it turns whitish. (Manufacturer recommended using oil based finish to protect once product cures in 48 hours) like any job, prep is key. your mileage may vary. Everywhere there is rust or bare metal turns a dark purple/midnight within 30 minutes. It foams a lot so wouldn't recommend using an air sprayer. The cleaning type sprayer (Windex bottle) would be good on "stream" for covering large areas of truck frame or large projects. When foaming occurs in project material; sampling rub with gloves hand or use fine napped paint pad or microfiber cloth. Used about 4 oz. to cover all leaf springs twice over. Next morning product seems cured with no off-gassing. Time will tell longevity. I tested rusty bolts, a shovel, some plate steel. Un cleaned truck frame, product was not picky ... Works on just about everything. Much easier, cleaner, better coverage and adherent, non-fuming alternative to POR15

Works exactly like it says. It does go bad once opened. Not sure what the shelf life is.

This is my second time buying this now. With the last jug I rust converted the frame on my truck and the frame on my friends 20 ft trailer. It worked great. I'm hoping it kills the rust so that my frames last a lot longer. My second jug is for the second truck I'm fixing up.

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

I give it a 4.5. Would be higher if not for the shelf life of the product. Initial supply chain glitch resolved with Paul. Converter works great if used according to instructions on the container ( jug). I did 2 coats 30 min. to an hour apart then a third coat the second day. Turns the rust, metal a dark purple, black colour then after the third dries to almost black. Just be sure to get the loose rust, flakes off (wire brush) before applying. One or two coats of paint and my truck frame looks new. Just be aware, product has a shelf life.

Work great!

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