The Fernox Express F4 400ml Central Heating Leak Sealer with 3 Nozzles is a high-quality product designed to seal leaks in central heating systems. Made by the trusted brand Fernox, this sealer is suitable for combi boilers with a tank capacity of 75-150 litres. It is energy-efficient, with an A+++ energy efficiency rating, and is effective in temperatures ranging from 40°C to 60°C. The product comes in a convenient white colour and includes 3 nozzles for easy application. Perfect for use in the United Kingdom, this leak sealer is a reliable solution for maintaining your central heating system.
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