Fernox Products UK — Reviews & Best Picks

Pros

• Seals small, inaccessible leaks without draining the whole system
• One bottle treats up to 130 litres of system water (around 16 radiators)
• Non-toxic and safe to leave permanently in the heating system

Cons

• Not a fix for larger leaks or damaged pipework

Pros

• Removes sludge, scale and debris to restore heating efficiency
• pH neutral formula is safe for all common system metals
• Concentrated formula treats up to 100 litres of system water

Cons

• Best used alongside a system flush for badly sludged radiators