Fernox Leak Sealer F4 is a market-leading internal sealant for central heating systems, designed to seal small leaks and weeps that cause pressure loss and boiler breakdown. The product forms a polymer at areas of oxygenFernox Leak Sealer F4 is a market-leading internal sealant for central heating systems, designed to seal small leaks and weeps that cause pressure loss and boiler breakdown. The product forms a polymer at areas of oxygen ingress, sealing pinholes effectively within 1–24 hours. Its advanced formula prevents blockages in boilers, pumps, and safety devices. Leak Sealer F4 allows leaks to be sealed without draining the system and uses non-flammable Barrier Pressure Pack technology with compressed air, ensuring safe application without air ingress or increased corrosion risk. Suitable for all system materials....View more
Features
Targets and seals pinhole leaks and weeps in inaccessible areas
Effective within 1–24 hours of dispersal
Proven to avoid blockages in boilers and sensitive system components
Seals leaks without requiring a full system drain
Non-flammable with compressed air propellant for safe application
Safe for use with all system materials.
Specifications
Type
Sealer
Manufacturer Code
62422
Brand
Fernox
Height
218mm
Size
400ml
Width
66mm
Depth
95mm
Fernox F4 Leak Sealer Express 400ml
Fernox F4 Leak Sealer Express 400ml: Quickly seals small leaks in central heating systems, prevents pressure loss, and protects components. Easy, non-drain application with safe, non-flammable Barrier Pressure technology.