BAC 50 Benzalkonium Chloride 50% – Powerful Algaecide & Fungicide – Removes Algae, Moss & Bacteria – Industrial-Strength Biocide for Hard Surfaces, Pools & Water Treatment – 5 Litres (5L)

Very good product. Don’t be disheartened - it does take a while before you see results but it really does work. Used it on large stones covered in moss and lichen and they looked brand new.

The product is the only one among many others that really kills and controls moss.We use it on sandstone patio, driveway, and walls. A couple initial spreads with a sprayer will not work instantly. It takes about 48 hours to get working. But then we saw its true power.Depending on season we only spray the patio etc about every 2 weeks to a month to keep control of moss. We gave a friend of ours some to try out. She gave excellent feedback and bought her own.

Given the product 3 stars due to the information about the product on the actual 5 ltr bottle.Described as 1:1250 I found myself having to ask for the mixture dilution advise.Have been advised 5 parts water to 1 part product for patio, and 3 parts water 1 part product for moss on roof.Find this rather expensive at those recommended ratio.Waiting to see results of application now!!

The product cleared the fouling on my patio ,paths and concrete surfaces

Clearing moss and algie from path and roof works well

Makes moss become not moss