Leak Sealer F4 is an internal leak sealer developed for use in HVAC and light commercial heating and cooling systems to seal small, inaccessible leaks and weeps which may cause pressure loss and boiler breakdown. Once dispersed within the system, the product finds the area of oxygen ingress and forms a polymer to seal the pinhole. Effective within 1-24 hours after application, the unique sealing efficiency of this market-leading water treatment chemical has been proven to prevent blockages or restrictions on vulnerable system components such as pumps, air vents and safety devices. A leak can be quickly and efficiently sealed, without the need for a complete system drain down. One 2.6G litre product treats up to a 528 gallon (2000 litre) system at a dose rate of 0.5%.

Silicon emulsion-based formulation designed to migrate to the sides of the pipework to plug microscopic, inaccessible leaks and weeps in HVAC and light commercial systems

Eliminates the need for a complete system drain down

Proven to be effective within 1- 24 hours after application

Resolves pressure loss issues quickly and efficiently with minimal intervention

Safe to use – does not cause blockages in pipework or vulnerable boiler components such as pumps, air vents or heat exchangers

Disperses quickly within the system to find the area of oxygen ingress and seal the pinhole