JOVS Sodium Hypochlorite 5 Litre – High Strength (14-15%) Driveway & Patio Cleaner – Concrete, Brick, Slab, UPVC, Roof & Fence Cleaner – Black Spot, Oil Stain & Odour Remover – Bleaching Agent

Great product. Diluted half and half and sprayed onto our patio and got rid of pretty much all the black spots and looks like new after a light jet wash to get rid of it after. I didn't have a mask but would recommend wearing one and I definitely will next time as fumes are pretty strong.

Awesome product great value for money. Highly effective, usual bleachy smell but nothing too strong. Adequate amount to the average patio. A couple of times. Prompt delivery. Very easy to use. Be aware will stain clothing, shoes etc. So be careful

Product very good and easy to use. I applied 50/50 solution/water and left for 30mins and used pressure washer- result amazing. It might not show much in the picture but the difference is remarkable. A bit pricey but worth it. I also used on conservatory - removed 5 years grime.👍

This stuff really is the real deal. Take care using it. I was wearing shorts and tiny splashes 'burned' my legs (well more like made them itchy), and my black socks were speckled white with bleach 😆 Clearly as strong as it says. It more than dealt with the patio, which had turned shades of dark grey in places due to the build up of scum and dirt from a winter of rain. I used a strong radio ~50/50 with water and spread it over with a hard brush to ensure all was covered by the formula. I then left for half an hour or so - maybe a bit longer - and when I returned expecting to scrub and rinse to clear what had been lifted, I could hardly believe my eyes! The whole patio was gleaming a lighter shade than I've ever seen it. Remarkable.. Highly recommend. Just make sure to take precaution and not have it drain anywhere delicate or flowered areas. I used almost the entire container for about 15sq m. Consider this a fair outlay cost wise for a once a year expensive which really saves you a lot of hard work if scrubbing or using a pressure washer

Mixed 50/50 in a bucket, wore old clothes and used a bristle broom to brush it on my quite blackened in places patio. Waited 15 minutes or so and rinsed it off with a hose. Patio back to new...really impressed with this solution.

Really effective, and a lot less money than the branded alternatives!

I wasn't very impressed with this cleaner, I did leave 40 minutes after I agitated the bleach with a stiff brush. It got off the litchen but didn't really touch the blackspot.

Absolutely fantastic on an Indian sandstone patio . Compared to jet was takes a fraction of the time .careful around plants and pets .also works on stained toilet bowls