Sodium Hypochlorite Patio Cleaner 4 x 5 litres of Industrial-Strength Algae & Black Spot Remover – Powerful Driveway & Paving Cleaner – Professional Outdoor Cleaning Solution for Concrete

One of the best products I hve bought to clean my natural stone patio. N hesitation to buy again.

My Indian stone was black and slippy. Looked awful. Power washer didn’t really make it sparkle. But this stuff is amazing !! Use a spray very near the ground on a very still day. Rinse it well. Leggings ruined but worth it. Lasts longer too. Minimal effort with best results. Wash out the power spray though or it won’t last until next time.

used to clean pathways, did the job fine.

Fantastic product for cleaning patio slabs. But please adhere to the health & safety instructions as this product will burn and fumes can be strong.

Very very good product

Ok. Historically I’ve pressure washed the patio. Last month, I spent a couple of hours AGAIN with the washer. Mildly better. I’ve used products that require scrubbing. Very time consuming and did do quite a good job. However I did not wish to spend half my life scrubbing! After a bit of research, and somewhat sceptical, I bought this product. Totally amazed! The photo shows a part application and the untreated area jet washed about a couple of weeks ago. It literally took about 20 minutes to apply to the area, plus about half that area again out of shot. The result was almost immediate. I left it about an hour, over which time I was gobsmacked! I just used a regular garden sprayer and diluted with 10% water.Thanks, great product.

Very effective in cleaning patios, and kills weeds in joints.

Been using this on my patio etc for several years now, no other product does the job better.My patio is hand carved Indian sandstone, it always suffered with green and black mould over the long wet winter months, with a treatment each spring it looks like new throughout spring, summer and autumn.