Hi Pete,

All the liquid cleaners I have looked at so far requires rinsing or washing the product off after the spreading process. Most business owners are not interested in the same o' same o' mess on their driveways.

And, they certainly don't want any water with cleaner mixed in it entering the storm drains at their places of business.

I believe a dry environmental chemical is the way to go.

My Best 2 U,

LindaC