Triple OX is the Achilles heel of oxidized vinyl siding, oxidized hardy board, oxidized metal and more. Tired of brushless oxidation products that promise the world and leave you up the creek without a paddle? Quit scouring the earth and check this stuff out. Triple OX is an advanced, sodium hydroxide free formula for a non-hazardous, safe to use solution. And yes, the one that sounds like it's named after a province of Canada is sodium hydroxide based which is why it's suited to clean concrete better than oxidation. The active ingredients aren't new, but we pack a lot more of them in than other companies do. Plus, we offer it at a price that won't make you squirm. Brushless oxidation does require some skill and is only recommended for professionals, but Triple OX is safe enough for homeowner use. Remember, the key to success is dwell time, and precision rinsing. Sometimes you DO need to apply a BIT more pressure than you normally would when rinsing a house (up to 1000 psi).