The product works well, but it’s not super quick. The part has to be free of grease or oil, but it does the job. I was able to free up the pipe handle on the hand crank of my SC after a 24 hour soak. I was able to crack it loose with a pipe wrench after soaking it for half a day, and it spun freely by hand after the second soaking.
Every time I’ve contacted Evapo-Rust with a question or problem, I’ve had the inventor of the product personally return my phone call. When I questioned the longevity of the product, he told me that they had improved the formula since it’s original introduction, and he told me to call him again when I wanted to order some more.
I would recommend the product, and would use it again. I like the fact that it is non-toxic and can be poured down the drain or in the ground when you are through with it. It also has no fumes or chemical smell.