Anyone have experience of this stuff?

Is this to remove rust and water stains from fibreglass? If yes, Google 'Oxalic acid', that's the active ingredient in virtually all of them, in a lot of teak cleaners too. Just buy the crystals and mix/dissolve them in warm water, it will do the same job at 1/20th of the price
Oxalic acid is Illegal to buy, sell, transfer or possess as a private individual now, unless in a pre-prepared product like Y10 with concentration 10% or less. There still seem to be a few rogue sellers online but any links here get removed and the poster sent to sit on the naughty step.
 
Last edited:
Is this to remove rust and water stains from fibreglass? If yes, Google 'Oxalic acid', that's the active ingredient in virtually all of them, in a lot of teak cleaners too. Just buy the crystals and mix/dissolve them in warm water, it will do the same job at 1/20th of the price
I use oxalic acid now and again, and it does a great job removing rust and grime, but this stuff seems to leave the deck and the hull brighter and cleaner.
 
Oxalic acid is Illegal to buy, sell, transfer or possess as a private individual now, unless in a pre-prepared product like Y10 with concentration 10% or less. There still seem to be a few rogue sellers online but any links here get removed and the poster sent to sit on the naughty step.
Definitely not illegal where I live. I bought this last week approx €6Screenshot_20260314_230632_Hepsiburada.jpg
 
The first ingredient listed, cas number 7647-01-0 is hydrochloric acid. Hard to read the second one but there is also phosphoric acid (cas 7664-38-2) and polyethylene glycol listed.
 
CAS number = Chemicals Abstract Service registry numbers, so you can easily google the active ingredients. It may turn out to be sold for industrial use only for safety reasons.
 
Oxalic acid is Illegal to buy, sell, transfer or possess as a private individual now, unless in a pre-prepared product like Y10 with concentration 10% or less. There still seem to be a few rogue sellers online but any links here get removed and the poster sent to sit on the naughty step.
I'd better stock up then whilst it's still readily available online.
 
Top