Block paving cleaner

[TheBinarySheep]

I need to get around to cleaning our drive. It's those grey permeable blocks that new builds have these days.

Some areas are showing a hint of green, and we've got some grass etc growing through some of the block.

Can anyone recommend a cleaner that I can use with a jet wash to spray on, leave and simple rinse off. Something that'll get rid of the green and also kill anything growing between the blocks?

At our old house I used to use sodium chloride, brilliant stuff, but our drive joins onto our neighbours drive and I don't really want to use something that strong near someone else's drive. Nor do I want to kill the grass next to the drive.

[TikTak]

We use sodium hypochlorite, 1 part to about 6 water and we have a grass verge (rinse off in the opposite direction) and it's fine

Doesn't put their cats off from stting in the bush either so seems gentle enough.

[TheBinarySheep]

TikTak said:

We use sodium hypochlorite, 1 part to about 6 water and we have a grass verge (rinse off in the opposite direction) and it's fine

Doesn't put their cats off from stting in the bush either so seems gentle enough.

That's good know, I might just do that then.

I've tried a number of products in the past, but they never seem to work as well as sodium hypochorite.

[MattyD803]

TikTak said:

We use sodium hypochlorite, 1 part to about 6 water and we have a grass verge (rinse off in the opposite direction) and it's fine

Doesn't put their cats off from stting in the bush either so seems gentle enough.

Did the same last year and I felt it lifted ALOT of mould/black spots (compared to just pressure washing) and it still seems to be looking brighter this year.