A proprietary outdoor wood boiler specific product - the consumer solution. Developed by professionals in the field of industrial water treatment. Will work in all makes and models of outdoor wood boilers. Full spectrum of corrosion inhibitors for both ferrous (iron) and yellow metal (copper and brass) system components for complete corrosion protection for your boiler and heat exchanger alike. An additional ferrous corrosion inhibitor is added that actually enables better film formation on the metal surface providing and forming a protective barrier. Calcium scale retarding polymers are added to help keep your heat transfer surfaces clean and efficient. Formulation has the ability to fight under deposit corrosion. Completely buffered and stabilized product. Easily test for chemical level with approved and inexpensive testing methods.You won't find a more concentrated product with these capabilities - 1 quart will treat a full 200 GALLONS of boiler fill water. Shelf life of 2 years. Compatible with glycol (antifreeze) As simple to use as simple gets with the BEST in protection. Dosage: 1 quart per 200 gallons of system fill water. Directions for use: Add treatment directly to system following the recommended dosage rate. Test and maintain at all times a level of 750-1000 ppm of chemical residual using an approved testing method. Add additional chemical as necessary in order to maintain this level. Not intended for systems containing aluminum or aluminum alloy components.