QT LIQ BOILER STOP LEAK STEAM 7 HOT H2O BOILERS

Black Swan's Liquid Boiler Stop-Leak is a superior liquid product designed to make lasting repairs on steam and hot water boilers. This product works on high and low pressure heating systems and withstands high temperatures, high pressure, expansion, contraction and vibration. Will not interfere with the operation of the system and the system will not have to be shut down to use the product.