Big hammer
Well-known member
Yes, I first purchased Evaporust to clean the cooling jacket in my Roadster. It cleaned the block but wasn't much good for anything else afterward and I did not dilute the product.
I purchased the Rust911 product almost 2 years ago and it's still going strong.
So my experience is the EvapoRust costs more and doesn't last as long as Rust911. YMMV
You by chance, did you put it back in their container and put the lid on tight?!
Once you open Evaporust it needs to breathe or you will kill it! I killed two gallons, I then read about leaving it open :-(