It's been around for at least a decade (Google for reviews), yet most of us have never heard of it. Maybe because it's from the USA, or maybe the price is a bit rich for us. It works by sequestration, so rather than converting the rust layer into a different inert form of iron, the iron atoms in the rust are selectively 'absorbed' into a water soluble 'macromolecule'. It's very similar to the sequestered iron plant feeds you use on rhododendrons, heathers, magnolias, etc. These plants can't absorb iron from typical soils. I suspect that disposing of spent Evaporust on your limey garden soil would do wonders for certain plants. Anyway, it's a pretty natty and simple approach to derusting. At £35 a gallon I won't be trying it myself.
TC
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