Removing Copper Sulphate stains from Tarmac!

[Mortimer Firewood]

Brick Acid don't leave it long or dilute it 50/ 50

[eggsarascal]

I think you are going to struggle to remove that. You could use something like Tarmaseal and paint over it, you'll have to do the whole driveway though.

 

https://www.tarmaseal.co.uk

[Mortimer Firewood]

Left Indian sand stone on Tarmac iron leached out of it and stained to 70% of that came out with brick acid.

[Millbert]

Thanks for the ideas. Will look into some acid I think! Not the drugs type I will add!

[dirtybiker]

Oxalis acid!

Gets iron stains off green oak. Works like bleach!

[voj maintenance]

Caustic soda?

 

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[agg221]

Pretty much any acid will do it. I would go for citric myself as it is environmentally less harmful and won't do you much harm either (although wear rubber gloves). It comes as crystals which you can dissolve in water - use hot water, a concentrated solution and a scrubbing brush and it should come off. Failing that, oxalic acid will convert it to iron oxalate which is colourless so at least you won't see it!

 

Alec

[Stoke Wood Project]

Apologies and thanks. Yes it's iron sulphate. Brain tired today!

Brian is always tired.

 

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[Millbert]

Thanks everyone. Will look into some acid.

 

Cheers

[eggsarascal]

Let us know how you get on.