here's a suggestion for you.... When I started out in this business, I tried a lot of different chemicals. I was paying between $22 and $30 for a 5 gallon pail. I later found someone who could replicate the chemicals I was using for only $1 a gallon!! In you area, you will find chemical manufacturers that will tell you they will not sell to end users. End users are nonmanufacturers, nondistributers, but people who actually use the chemicals, like ourselves. You'll run into some roadblocks trying to buy from the manufacturers, but you will eventually find one out there that will be willing to sell to you. This has been one of my greatest finds in the pressurewashing business and has saved me mopre money than you can imagine. I run throught about 165 gallons every 2 weeks.