Plugs small internal weeps and leaks in central heating systems;Ideal for reducing pressure loss from sealed systems;Saves time and money on draining down and repairing;Treats 100L system or up to 10 single radiators;Compatible with all metals and materials commonly used in central heating systems

• Fernox 56603 500ml F4 Leak Sealer

Fernox 56603 500ml F4 Leak SealerFernox