Spear and Jackson - Spray and Leave Concentrate 2 x 5 Litres - Kills Mould, Algae & Lichen From All Exterior Surfaces

Our dark grey block paving drive was beginning to take on a light green “tinge”, after a wet winter. So, after reading all the reviews, we bought Spray & Leave, waited for a dry day around beginning of April, and sprayed it all over with a hand-held, pump action pressure sprayer. The results are impressive. Its a month on, and the drive is back to grey. It was effortless to apply, and it does seem to keep on working, despite it having rained since. We have now today, used it on our algae-ridden decking, and I have no doubt it will come up lovely. We will definitely buy more, in the future, when it is needed. I highly recommend it.

Need to power wash all the area first allow to dry fully on a fine day. Coat the area well with product on a fine day to penitrate surface and it works well. Does work on plastic garden furniture but does need doing again late in season as it washes off in rain.

This product I saw my neighbour using on his block paving to get rid of weeds and I have seen the difference using this product, I have used for the first time on my block paving and I have already seen the improvement very good.

Previously my husband and I used a Karcher Power Washer to clean all hard standings. Him on the Karcher, me on the broom, brushing and picking up sludge. When he wasn't able to use Karcher, I used 1 litre of Thick Bleach to a Bucket of Water and worked it in with a broom. I read about this and decided to give it a try. I have a 20 litre Spray Backpack, but can only manage 10 litres, as it's too heavy otherwise. I used 7.5 litres in one go. Then order another 10 litres, which, again, I used in one go. Have just ordered another 10 litres which should do the trick. From my point of view it is easy to use. The only drawback is having to keep filling the backpack. I tested it on an Outdoor Rubber Mat covered in Green, it worked a treat. I can't say about longevity, will just to wait and see. I used the Concentrate.

Worked well & all the green was irradiated within an hour.

Works well so fate. We will see in a few months.

Arrived on time 12-6-24 & well packed.I've only had this item 2 days and amazon is asking me for a write up.Even when I have used it it takes a week to see a difference and some rain to have been put down on it. How can a person try to give an accurate write up. ( It's crackers ) the rating I have given is what I have seen on TV progs & what I have been told by friends.

Our block paved back yard does not get the sun so suffers from greening up over the years, this stuff is amazing, spray on and leave and over the next vew days its gone totally without pressure washing, A few month later its still the same