81756 Rust Dissolver Gel, 8 oz., Red

Very strong solution and works fast.

I have used this on a few things that I had already tried several different rust penetrants on with no success, & this just flat-out WORKS! You have to follow the directions! It will tarnish the metal if you leave it on too long & don't wash it down with water as instructed to do. I now have hope that I can get the front brake lines loose on the Dakota I bought that had apparently spent part of its life up North in the rust belt. HOWEVER, I just can't FATHOM WHY they didn't include a BRUSHED CAP! It's a gel that HAS to be applied with a brush, so why not supply it IN the bottle?! That's a glaring oversight in an otherwise GREAT product! I bought some cheap watercolor paint brushes to use for this.

Good rust remover.

Worked pretty good on my rusted golf cart floor. Easy to apply.

I'm somewhat impressed! I used it on my boat trailer (rusty springs, hubs, etc), and it worked nicely! I "painted" it on with a brush, let it sit for about 30 minutes and then applied another coat, lightly brushing it into the metal to ensure it was in every nook and cranny. After letting it sit for another 30 minutes, I hit everything with the garden hose. Much of the metal was rust free, and what wasn't, I can very easily paint over. Note: It is advertised as a gel, but is more of a thick liquid. Still stuck nicely to wherever I put it.

I collect vintage Ka Bar knives and restore then. I've spent well over $200 on rust remover and polisher in the past 30 days. This product contains phosphoric acid as most other rust cleaning products do. The bottle says do not use on Chrome for more than five minutes. I suggest you never use it on chrome. I bought a liquid rust remover at Walmart and it ruined two of my knives. I hoped Permatex 81756 would remove the spots that the Walmart junk left on the blades. It did not. As for rust removal, it removed about 40% of the rust. I will give the knives another treatment this evening. After that, I will go back to buffing with a Dremel and jewelers compound which I bought at Amazon. However, I will soon buy a 6" bench grinder and buffing wheels from Amazon as that is the preferred method to clean and buff knife blades. The Dremel tool is good but takes hours and days of work instead of minutes that can be done on a bench grinder with buffing pads. I prefer Amazon for buying almost anything. It's nice if you live only one day away from their warehouse! I have spent thousands of dollars at Amazon. I wish they would sell used or vintage knives. I buy most of my knives at eBay. But I believe some sellers bid on their own products. Caution: do not rinse the treated knife or object in a stainless steel sink. It will leave dark spots on the sink. Do not use the product around marble counter tops. It will leave a white stain. Do wear gloves. Do vent the area well.

Great product. Works well and less work than the other brand I tried. Cleans up easily

This is the first time I have used this product, and I am liking it more and more as I work with it. I am getting good at estimating the correct amount of time to leave the product on based on the level of corrosion. It's a semi-thick gel and stays where you brush it without dripping. It rinses off fairly easily however, so I like using this product. I did not have access to a water hose for some of my projects, and the gel came off fine when using water from a pump sprayer. It's not overly aggressive when left on for a few minutes. It couldn't completely clean some heavily rusted shackles, but got enough off that I could finish the job with a wire brush and electrolytic bath.