Liquipak BAC 50 5L Benzalkonium Chloride Concentrated – powerful outdoor cleaner for roof cleaning, soft washing, patios, decking, paths & general exterior cleaning.

Arrived on time bac 50 cleans our block paving very well moss and weeds. Put it on with a watering can mindful of plants would like a proper measure in cup so now wast ....

Excellent product. Excellent service

Used before very good clean moss on tarmac drive and paving

product accurately described fast service

This is useful and better than the weaker types in garden centres

Good product that I’ve used before and already can see it is killing off moss within 5 days of application Easy to dilute and use Considerably cheaper than alternatives particularly when treating a large area

This is the active ingredient in Patio Magic, which costs almost the same per 5L despite only containing ~7.5% benzalkonium chloride. Buying this concentrate is, therefore, significantly better value while enabling the user to mix a strength appropriate to their own needs. Just like Patio Magic, this stuff took the winter growth of green algae off my patio, fences and walls within a couple of days of application. This isn't the right stuff to kill moss, and it will struggle with algae on rougher and more porous surfaces.

Not what you think! This stuff will kill ‘green’ things very well, on decking fencing and patios etc. but it will not clean the actual patio if that makes sense. So the moss between the slabs it killed, that weird green stuff at the bottom of your fence it kills but your still going to end up power washing your patio to get everything else off so a bit pointless.