Stained slabs

[Colin Nash]

That stuff you put on lawns as a weed and feed. Comes as granules. Think it's called Aftercut.

Left a box of it outside on the table and forgot it. Wind blew it over and when it rained it stained the grey concrete slabs yellow.

Anyone got an idea what to use?


Cheers Colin

 

[Jamie Biles]

Check the box,probably more of a rust stain as it's likely have iron sulphate in it

 

[J S]

Hypo ( hypochlorite )

 

[Ian McFarlane]

Hypochlorite won't work. You'll need something to reduce the iron, citrate or oxalate based cleaner is more likely to work.