Patio Black Spot Remover Patio Cleaner - Black Spots, Lichen, Green Algae and White Fungi - Restore Natural Colour - Biodegradable - 2 L (Block Paving 4 Litres)

Does exactly what it says it does, you can see the transformation in front of your eyes as it does the job. It is a touch on the pricey side so it's important to follow the application instructions as you don't want to waste any. A pump sprayer is essential tbh.

Good product but expensive if there is a large area to cover

Absolutely amazing product

Cleaned the front drive well. Cleaned all the White fungi very well but not the black spots. When you consider the cost it is debatable if the product is worth it. Note I followed all the instructions to the letter with excellent conditions, yet did not shift any black spots.

Very expensive but the only thing that works on old block paving black spot lichen. Don't dilute or use in too hot conditions or where rain is forecast. Seems to enhance colour of block paving as it soaks in. May need multiple applications but does work.Doesn't tend to dry out too fast but work in small areas and use sparingly.Must wear protective clothing and a respirator mask.

Followed the instructions to the letter.Soak the drive thoroughly in the evening. Jet washed 48 hours later with my karcher.Colour came up OK. Never touch the black spot on the block paving. Very disappointed with the outcome, get just as good a result from normal patio and block paving cleaner one third of the price. Always looked after my block paved drive and had great expectations from this product unfortunately it just didn't do the job.

It worked a treat on block paving. Worked best when applied liberally.

The sandstone cleaner worked very well but as the black spots were in patches, one bottle covered a large area. On our block paving the black spots were more widespread so had to cover the whole area. Could not set my sprayer to a fine mist so one bottle did not cover a large part of the paving, did clear most of the black spots in the area treated