I tried all sorts but found the only thing that worked was Dettol mould and mildew remover.
Chaps.
Area has been down four years and apart from a couple of pressure washers a year it has remained looking bloody good. However over the winter it has taken a big hit from black spot.
There are loads of products out there that seem to do the job but before I part with hard earned has anyone had fantastic results with any product
Ta
Pitch
I tried all sorts but found the only thing that worked was Dettol mould and mildew remover.
Only thing I found that removed them was household bleach, couldn't believe it after trying even brick cleaner that wouldn't shift them.
One to one bleach to water, in a bucket and brush it over, keep area wet for a good couple hours, mine then was clear.
Worked for the black spots I had on my slabs anyway. Good luck.
Excellent chaps, ta
Pitch
There’s a cleaner you can get in costco called wet it and leave it - or similar - that seems to do a good job!
Jbo
Sodium hypochlorite chlorite. Just did mine- amazing results
Last edited by awright101; 25th April 2018 at 12:53.
We use Red Label both on the patio and decking, normally a 1/3 to 2/3 mix in a watering can with a rose, then a stiff broom. Be aware that this will bleach anything you wear and kill the grass etc,
http://www.molevalleyfarmers.com/mvf...l-hypochlorite
You could use a higher concentrate for stubborn marks.