Pro-Kleen Ultimate Black Spot Remover and Destroyer for Patio, Stone, Block Paving, Indian Sandstone, and more. Easy to Use Fluid that Powers Through Stubborn Dirt & Grime (5 Litres)

Great product. My Indian sandstone slabs have not been cleaned for a few years. This solution is quick and easy to use cleaning most of the black spots off the slabs on the first try. Used it again and the black spots are gone. Don’t use anything else. We used another product which was a waste of money. Would definitely recommend this product.

flabbergasted at the transformation of my patio, the colour has been completely restored - I never knew it was this colour! To add, the “before” pictures our patio is relatively clean, it had its post winter pressure wash around 4/5 weeks ago, so it’s not dirty. I sprayed it on with a pressure sprayer, I did just tip it in some areas and used a yard brush to scrub it in. Left it for 3/4 hours. I couldn’t cover the whole garden with one bottle so you’ll be able to notice the slabs that were less of a priority. Have ordered a second bottle to finish! Definitely recommend.

Initially it didn't work removing black spots. When using a sprayer bottle, there is simply not enough solution hitting the patio slab. I ended up applying much more of the treatment with a large paint brush, and then power blasting after 3 to 4 hours. A further two treatments were required and that removed the majority of the black spots. You get there in the end and the finish is good. You just end up using a lot more of the solution than the instructions state to get the job done.

This is a second purchase for the patio at the back. The cleaner worked well on the front patio .

Excellent cleaner. Very powerful and a very heavy fumes. A face mask and glare are recommended . We’ve just moved into property. Patio not been cleaned in years. We wanted to renovate and reuse a few slabs on a smaller patio at the end of the garden. Wow what a difference ! Had to repay a couple as black spot was very stubborn. Highly recommend

Basically expensive bleach

This product is amazing. I tried various other products and they didn't work but this stuff transformed my patio in less than an hour - delighted with it

I recently used the Pro-Kleen Ultimate Black Spot Remover and would give it a solid 4 stars overall. It’s a powerful product that really delivers when it comes to tackling stubborn black spots and lichen on patios and paving. One of the biggest positives is how effective it is. After applying it with a sprayer and leaving it for a few hours, I could already see the black spots breaking down, and once rinsed, the difference was very noticeable. It genuinely brought tired paving back to life, which is exactly what you want from a product like this. It’s also straightforward to use—no complicated mixing required, just apply, leave, and rinse. The coverage is decent too, so a single container goes a long way on medium-sized areas. Overall, this is a very effective and easy-to-use black spot remover that saves a lot of time and effort compared to pressure washing alone. With a bit more gentleness on surrounding areas, it would easily be a 5-star product.