top of page

Fernox F4 LSI leak sealer seals most weeps and small inaccessible leaks in sealed systems without causing blockages of the pump, air vents etc saving time and money on draining down and unnecessary repairs.
Ideal for reducing system pressure loss
Compatible with all metals and materials commonly used in heating systems
500ml easy-pour bottle
Non-toxic, environmentally friendly formulation

Fernox F4 LS-1 Leak Sealer 500ml

    bottom of page