Tectaloy Mukowt is an alkaline based radiator cleaner for removing oil & sludge from all radiator types. Tectaloy HD2 is a heavy duty acid based radiator cleaner for removing rust & scale as well as oil & sludge. Tectaloy Stop Leak is an emergency temporary fix to seal leaks in radiators, heaters, thermostat housings, water pumps. Effective at controlling gasket seepage. Add to existing radiator fluid.
