Forum: Flags and Slabs
Topic: Cleaning stains off black limestone
started by: luciofulci

Posted by luciofulci on 15 July 2019,09:06
Hi All,

I've got a patio made from black limestone slabs, it's been down about a year. I used some moss killer on the grass and about a week later I saw these orange stains on the slabs near the grass - see below.

Has anyone got any suggestions as to what I can do about this?

Also do I need to seal these? If anything gets split on them apart from water the mark stays for ages before going. For example the Mrs decided to stand on one whilst spraying sun tan lotion on her feet - I've still got feet shaped stains two weeks later!

If so what should I seal them with?

Many thanks

Posted by luciofulci on 15 July 2019,09:09
Sorry I don't know why I've posted twice I only clicked preview and then post - can one of the mods delete this?
Posted by Tony McC on 16 July 2019,10:12
Use a non-acidic rust remover - Rust-ex or PaveTuf Rust Remover - but, as ever, trial a small, dicreet corner first to ensure there is no adverse reaction.

Also have a read of the < Black Limestone Page > on the main website.

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