yard cleaner

[SilliamWhale]

Benkazolium chloride

 

[Cowslip]

Surely all you need is @Robert K he would do it for you for pie and cake

 

[Robert K]

As others have said either an acid based solution but be careful with those some will eat away the concrete/patio.
Or
A hot water pressure washer with a bit of detergent will be a safer option

 

[will l]

Youll all be aware of this i am sure.Chemically speaking, bleach is a solution of sodium or calcium hypochlorite. When mixed with any acid, it releases highly toxic chlorine gas. ... The acrid fumes of chlorine can destroy lung tissue, cause the lungs to fill with water and in a sense cause death by drowning.

 

[quattro]

Sulfate of iron is used for moss on tennis courts

Would that be ok for asbestos foods?

 

[2wheels]

Would that be ok for asbestos foods?

asbestos roofs? the same as concrete, it will discolour it.

 

[quattro]

asbestos roofs? the same as concrete, it will discolour it.

Yes roofs ,never noticed it said foods!!

 

[Clive]

Farm Marketplace sells lots of this stuff to driveway cleaning companies and swimming pool people

Bulk Sodium Hypochlorite 14/15% | Inputs | Farm Marketplace

Bulk order Sodium hypochlorite from Farm Marketplace for fast delivery. Uses: liquid sanitiser and disinifectant, chlorine source for shock treatment on pools,

www.marketplace.farm