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UK Window Cleaning Forum => Window Cleaning Forum => Topic started by: Scottish Cleaning Service on August 19, 2025, 04:06:46 pm

Title: Iron Sulphate on slabs
Post by: Scottish Cleaning Service on August 19, 2025, 04:06:46 pm

One of my customers mixed Iron sulphate in a watering can on his nice new white patio. It now has plenty of brown marks which he wants me to remove. Has anyone used a good chemical which works  before I try a few non-starters. Tried white vinegar and lime juice to no avail. Next thing I will be trying is baking soda. Bought 5 litres of a chemical from Bonnymans years ago but can't seem to find it. Thanks m

Title: Re: Iron Sulphate on slabs
Post by: CleanClear on August 19, 2025, 05:03:53 pm

You need oxalic acid.

https://www.diy.com/departments/owatrol-net-trol-wood-cleaner-restorer-1l/3297971008204_BQ.prd

https://www.diy.com/departments/purechem-oxalicacid-5-solution-1l/5060542701754_BQ.prd

Title: Re: Iron Sulphate on slabs
Post by: Simon Trapani on August 19, 2025, 06:03:17 pm

Quote from: Scottish Cleaning Service on August 19, 2025, 04:06:46 pm

One of my customers mixed Iron sulphate in a watering can on his nice new white patio. It now has plenty of brown marks which he wants me to remove. Has anyone used a good chemical which works  before I try a few non-starters. Tried white vinegar and lime juice to no avail. Next thing I will be trying is baking soda. Bought 5 litres of a chemical from Bonnymans years ago but can't seem to find it. Thanks m

This is the window cleaning section.

And I don't understand wtf you get involved? Cleaning windows is so much easier & pays well enough.

Title: Re: Iron Sulphate on slabs
Post by: Splash and dash on August 19, 2025, 09:45:52 pm

Rust Bon from Bonnymans will remove it

Title: Re: Iron Sulphate on slabs
Post by: Rob.Hall on August 20, 2025, 02:45:07 pm

Benz soft wash do a rust remover.
It's excellent!
I have used it with great success.
Just follow instructions.