CRC (18419-4PK) Rust Converter - 128 oz., (Pack of 4)

Works great and affordable! Put a shine on and did turn the rust black. Applied with a microfiber cloth with good results.

This stuff works!

I'm using this to treat rust on an '83 chevy truck. I think it's working much better than the Rustoleam Rust Reformer which I was using for a while before switching to this. Although the rustoleum product was much easier to use, rust came back in several spots. I cleaned those spots up and applied the CRC Rust Converter and so far no rust! I was also worried that I would burn through a quart really fast, and at $30 or so a bottle, it's not cheap. However, I've done several spots on the exterior body, the floor panels, the frame rails and the gas tank with this CRS Rust Converter and I still have a lot of the bottle left. Very good stuff!

I've used this product for about 30 years. It has changed brands (or distributors) several times over the decades. I'm still amazed (and now my 17 year old son is amazed) at how it just gets rid of the rust - almost effortly. It leaves behind a great surface ready to be painted (or sanded then painted). My most recent use was for outdoor furniture - it turned out great. Keep in mind that you should not return the product to the original container, and that you will probably need to discard the brush, etc. after application. And I always use gloves and eye protection when applying this or any other chemical.

I received and applied this product with apprehensive thoughts. I read through many other reviews and understood I needed gloves, glasses and to prep the surface I intended on applying it to. Which happened to be mostly frame and some body spots on our truck which is almost 4 years old but is subjected to copious amounts of road salt during winters in WNY. My apprehension started after applying the "first coat" (manufacturer says to do two) and not seeing the ruat turn "black." It did change colors, more specifically turn darker in "rust orange." I also observed after the fist coat dried, it left a mild sheen on spots it was applied to like it was leaving a protective coating. I applied the first coat to areas I prepper by rinsing with clean water then brushed heavily blistered areas with a stainless brush and wiped free of dust, dirt and debris. After this first coat, I heavily sprayed on a second coat with a pump action sprayer coating all surfaces (not just those showing rust) hoping the layer would prevent any further rust from occurring. As my headline states, I hope it works. I trust in CRC products and believe they perform as described, well we'll see come April when things thaw out.

Used this to prime some 1” outdoor exposed gas fittings and black pipe. Worked quickly and converted the slight amount of rust on the lines left after it was installed. Sections of the black pipe were still covered in the protective coating and needed to be stripped as the converter would not activate without direct contacts with the slightly rusted metal. Dried quickly and seemed to provide a strong base for the oil paint I applied the next day.

The product works as advertised. It quickly produces a tough black coating over light rust that looks good by itself and appears to take paint well too. However people may be tempted to use it on BBQ, shop equipment, trailers, etc. that are exposed to high temperatures in service, or that may someday need to be repaired by welding or grinding. The coating contains chlorinated compounds that can evolve poisonous phosgene gas when heated. This was confirmed by CRC when I inquired (BTW their product technical support is outstanding). I feel that THERE SHOULD BE AN EXPLICIT WARNING against any use that could encounter high heat, whether intentionally or inadvertently. In my personal view, anything made of steel may at some point need to be repaired by welding or grinding, long after it has left my possession (after all, I'm looking at this product in the first place to restore an antique). I do not want anyone hurt, so I will use a different product, even if it doesn't offer as good a finish.

This seems to work very well. Used this on the underside of my truck. Looks good, and as it doesn't gunk up everything, you can still turn a wrench under there. As this is a chemical reaction, and the label says temperature between 50-90F, I did wait until the weather warmed up to the mid 60's before applying. I cleaned off the surface rust with a scraper and wire brush. Sprayed the underside of my truck with a garden sprayer in two coats. it has turned all rusted surfaces black. Wear a mask, especially working under something. Cleanup is easy with just water. We'll see how it stands up to east-coast weather and salt.

I use it on various fab projects. Easy to use, a little goes a long way.