Fernox F1 protector protects against corrosion and limescale in mixed-metal central heating systems. It stops frequent venting of radiators, prevents sticking pumps and boiler noise, and prevents cold spots in radiators preventing boiler breakdown and improving system efficiency. Used in conjunction with F3 cleaner, gas savings of up to 15% can be achieved every time you heat your room.

Protects against corrosion and limescale

500ml easy-pour bottle

Non-toxic, environmentally friendly formulation