Utility Wonder Quart HYDRO-SEAL+4 Hot Water Boiler Stop Leak

Utility Wonder 15-2011 One (1) Quart HYDRO-SEAL+4 Hot Water Boiler Stop LeakThis liquid treatment seals leaks in circulating hot water systems, plus it inhibits rust, stops circulation noise, prevents air pockets and lubricates the system. It contains no petrochemicals.Amount Required: Use One Quart Of Hydro-Seal +4 For Each 22 Gallons Of Water In The System. One Quart Is Usually Sufficient For The Average Single Family Home Boiler System.NOTE Do NOT Use In Steam Boilers Or Boiler Systems Containing Anti-Freeze