Plugs small internal weeps and leaks in central heating systems;Ideal for reducing pressure loss from sealed system;Saves time and money on draining down and repairing;Treats 100L system or up to 10 single radiators;Easily and quickly added via a radiator or filling loop

• Fernox 56703 290ml F4 Superconcentrate Internal Leak Sealer

Fernox 56703 290ml F4 Superconcentrate Internal Leak SealerFernox