Pro-Kleen Powerful Black Spot Remover (10L) Liquid Cleaning Solution for Dirt and Grime, Use on Patios, Natural Stone, Indian Sandstone, Block Paving

Apologies for the delayed review.Product was great. Used 10 litres, following 10 litres of another product. Your product cleaned so much better and removed the majority of black marks, etc left by the other product. Next time forget the less successful product - straight to your.Some black spots remain on a few pavers? Seems these pavers have a different stone that does not respond as well - Puzzle?

Excellent product. I left over night to give it a good chance, hosed it all down and no need for jet wash which I was relieved. Ended buying 4 more and garden and pathways now ready for summer. You can see the difference below. Does have high stench of bleach though

it works very well my patio still looks very clean after a few months the only downside is it being powerful the smell of the bleach in the product is almost overpowering

Brilliant stuff! Got rid of the black spots.

The media could not be loaded. This is by far the best product I have used for my patios and paths! It's a little bit on the expensive side but we'll woth it. I put it on straight from the bottle and did not dilute it. Left it for a couple of hours before power hosing off, although I reckon just a hose would have done.You can physically see it getting to work lifting years of dirt and black spot off the stone. I tried a cheaper one a couple of years back from a well known DIY store but it hardly shifted the black spot. This product will be my go to from now on. Highly recommended.

This stuff is magnificent. I put it on with a watering can as I didn't have a sprayer (have bought one now to do the rest as otherwise it goes quick) and left it less than 2 hours because you could see it had brought the path up so clean in just a short space of time. (And I really do mean SO clean, like brand new slabs) Then rinsed off with a hose. Really quick and easy. Yes it smells like the love child of a swimming pool and a bottle of neat bleach but who cares - the smell fades after a day. My front path is now a thing of beauty. Have bought more to spray the back paths and am looking forward to it all looking like when they were first laid.You would want to keep pets away from it until rinsed off but if you do it with a sprayer that shouldn't be a problem either. My best purchase in a long time! Happy, happy days.

The product is very good and this was a repeat order but disappointed with delivery as didn't get yhe delivery on the promised day which was delayed by another two days.

Loosely jet washed a large patio and then applied the product with a watering can and hard brush. Left overnight and then washed down. Results were very good, not perfect, as some black spots remained on each flag. My powerful jet wash machine would not have yielded such good results. Would buy again.