Pro-KleenUltimate Black Spot Destroyer for Patio, Stone, Block Paving, Indian Sandstone, and more (10 Litres)

Best stuff I have ever brought don’t waste your money on anything else value for money.Easy to use we had black spot everywhere quite thick in some areas as you can see from photos, the cleaning of this stuff is brilliant our sandstone slabs like new again.The lighter black spot disappear after an hour or two, the thicker BSpot had to give it a second coat but well worth it. Would definitely buy again.

Purchased after a recommendation from a family member. Very easily applied using a watering can with a rose type nozzle. Left for a couple of hours and just gently washed away with a hose, not even a jet wash. It removed 10 years worth of black spot and also did the annual clean of the patio. Be careful to wear a mask, eye and clothes protection and gloves as it smells like a very strong bleach and literally froths up a bit on the slabs when applied. We would certainly purchase it again. Photos show a before and after how it was a couple of hours after application on half of the patio before hosing away. The sun had dried it off a lot, but still had a good result.

It certainly brought my Indian stone slabs up like new, however, it didn’t remove all the black spots hence 4 stars, but it did reduce them and I would buy again.

I've used this on my patio walls and steps. On the first application it cleaned the cotswold stone great. However, on the slabs with the heavy black spots it only removed around 80 percent. I applied a second coat on the slabs and although it never removed all of the black spots completely it is more than acceptable. I've used brick acid before and would say this product is far better in my opinion. Well worth investing and giving it a try. Many Thanks

This product did everything it claimed to do in the advertisement, I had let my patio get into a terrible state with black spot, I had kept it clean with detergent and power washing but had never done anything about the black spot which by then had covered most of it, after researching the internet I discovered that the product was highly recommended, I decided to gift a try and found the results were excellent, it was simple to use and I would and have recommended it to friends and family.

This thing is Amazing, I had been pressure washing these slabs for 7 years but the black spots and the gray tint on them never went away....this thing worked like magic, it took away the black spots and the gray tint the tiles look literally brand new!!!!Only warning very steong smell of bleach every part of my cloths it touched went white because this thing is strong...but if you observe all precautions and protect your self ...this thing on youe slabs once a year and youll mever need a pressure washer or any thing els.5 Liter bottle can cover between 20 to 25 Square meters.Love it!!!

Was not expecting the brilliant results after using Pro Kleen Ultimate Black Spot Destroyer. Sprayed on, left for 4 hours and hosed off. No scrubbing or power washing. Couldn't have been easier! Fast delivery of product from Sales Direct Online. Would definitely recommend this product and would buy again

I need to give certain stubborn areas a third treatment. But these were from years back and so the blame lies with me.