Quote:
Originally Posted by tubman
Evaporust is not an acid, but works by a process called chelation. It is much safer to use than any of the acids (molasses, citric, phosphoric, etc.).
I use both Evaporust and Rust-911. I find that Evaporust works better, but Rust-911 is cheaper. Perhaps I am mixing the Rust-911 incorrectly since it is a concentrate,
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Rust 911 can be mixed to be more concentrated than Evaporust so it works faster BTW.
Rust 911 is $80 for 16 gallons($5 per gallon) vs $30 per gallon for Evaporust.
I've bought many gallons of Rust 911.