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

The product is pretty easy to use, just make sure it’s shaken up well before using. You can tell a color difference if you don’t. It doesn’t “bind” the rust the same.

Used on steel beam supports that I first scraped and wire brushed. Exterior. Product went on nicely and a little goes a long way. Used a good quality brush and did two coats. Going to wait 48 hours and go ahead with a Rust Oleum oil based finish coat. Time will tell but it appears to have put a nice sealer primer sort of finish on the beams.

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 used this on a truck frame and steel flatbed. Scraped and cleared all flaking rust and dust first. Brushed it on with a 4” paint brush and it seemed to do what it says it does. It did not dry totally black. Had a speckled appearance, but I plan to top coat with rust preventative paint anyhow, so I’m fine with it. Covered really well. Did the entire frame and bed top with less than 1/2 gallon.

Works good

Excellent product that applies easily and is water based.

I've used this product several times in the past with great results this last time I used it product washed off after 1st rain and curing for 4 days believe I just had bad batch customer service issued full refund

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.