Patio Black Spot Remover

Martin Pentreath · 2013-06-11T16:12:00+00:00

Hi all, Does anyone have any experience of this stuff? th=60&product_id=54 By way of background it is intended to remove highly persistent black funga l growth from Indian sandstone paving. I've got some in my back garden, and the black spots have started to appear. They do disfigure the look of the stone, and they multiply each year. I've tried high-powered pressure washin g and ordinary moss-and-mould-killing type of stuff - nothing will shift th e black spots, and this is the general experience reported by others from a bit of internet research. Indian sandstone is particularly prone to it for some reason. The stuff in the link claims to do the trick. The reviews on the website al l give it five out of five - well there's a surprise! It costs roughly the same as malt whisky, which is fairly horrendous for a cleaning product. If it works it will be worthwhile, because the alternative will be relaying th e patio with something less prone to black spots.

Jun 11, 2013 44 Replies

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Anita Palley 9 years ago

Thanks for this. The cheaper bleach option worked for me.

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nicebutdim25 9 years ago

I have just used black spot remover and give it 3 stars not 5 it gets rid o f some but by no means leaves the stonework as new.The claims are grossly o verrated.The result is on a par with Domestos,The drawback with Domestos is the smell and the efect it has on some plants

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Martin Pentreath 9 years ago

Hi, I started the thread nearly four years ago. As far as I can tell, the o fficial black spot stuff is just bleach sold at a vastly inflated price. Th e reviews on Amazon and elsewhere are, let's just say, suspect. Anyone who is fortunate enough to find this thread first via Google should try domesto s first.

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mike.doherty18 9 years ago

Thanks, Martin, and to everyone else who contributed to this thread. Have just washed my Indian sandstone patio for first time in 2 years to find black spot in certain areas. Will try the bleach option first. Regards, Mike

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apmitch42 9 years ago

Used Asda Thick Bleach (currently 2 x 1 lt for £1) - worked a treat. I nitially used it neat but also found that a 1:1 dilution with water also wo rked OK. My method - use a watering can to damp the slabs. Pour on the bleach - just drizzle over the slabs. Then use a yard brush to work all over the slab (g etting a nice foam) paying particular attention to edges. Leave to dry. Hos e down. My slabs run adjacent to my lawn but by saturating the adjacent law n, the lawn looks perfect. Really pleased with the results!

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