Best Central Heating Antifreeze Deals Online in the UK (10 Deals Found)

Last Updated - 29/10/2026 Sort By:

Best Choice
Chemiphase

New
DB 5300 Central Heating System Freeze & Corrosion Protection – Long Lasting Antifreeze & Corrosion Inhibitor for Boilers
Complete Heating System Protection – DB 5300 provides advanced freeze and corrosion protection for boilers, radiators, a

£17.99
Alde

New
Alde G12evo premium antifreeze (4080-141)
Can be used in the place of Alde Premium G13 Antifreeze (4070-120)

£15.00
Chemiphase

New
DB 5300 Central Heating System Freeze & Corrosion Protection – Long Lasting Antifreeze & Corrosion Inhibitor for Boilers
Complete Heating System Protection – DB 5300 provides advanced freeze and corrosion protection for boilers, radiators, a

£35.99
Best Value
Sentinel

New
Sentinel - X100 Inhibitor 1L, Market Leading Heavy Duty Central Heating Inhibitor, Protection Against Corrosion and lime
The industry standard inhibitor, providing protection for clean central heating systems against limescale and corrosion;

£19.91
LavaTap

New
LavaTap – Sentinel X100 Central Heating Inhibitor – 1 Litre Radiator Inhibitor, Rust Prevention, Corrosion Protection, C
Central heating inhibitor for long-term system protection – LavaTap Sentinel X100 protects sealed, open-vented, and comb

£22.99
16% Off
Everbuild

New
Everbuild P14 Central Heating System Inhibitor, 1 Litre
Compatible with plastic and fibreglass header tanks and with all metals used in central heating systems including iron,

£12.19 £14.56
Chemiphase

New
DB 5300 Central Heating System Freeze & Corrosion Protection – Long Lasting Antifreeze & Corrosion Inhibitor for Boilers
Complete Heating System Protection – DB 5300 provides advanced freeze and corrosion protection for boilers, radiators, a

£64.99
21% Off
LavaTap

New
LavaTap – Fernox F1 Central Heating Inhibitor 500 ml – Inhibitor for Central Heating Systems, Radiator Inhibitor for Rus
Fernox F1 Central Heating Inhibitor: This Fernox F1 central heating inhibitor protects sealed and open vented systems by

£21.99 £27.99
ColumPRO

New
ColumPRO Central Heating Dosing Tool, Designed for Adding Rust Inhibitors, Sludge Cleaner, Antifreeze Fluid & Sentinel x
Fast Dosing — Complete a Full Heating System in Around 30 Seconds for Maximum Efficiency

£13.49
SPI

New
QuickFill - SEL9260: Central Heating Dosing Tool - Add Chemicals Like Fernox Central Heating Inhibitor, Sludge Remover,
Quick and easy dosing of chemicals into central heating systems

£12.50

10 Central Heating Antifreeze deals are available from: Amazon stores, starting from £12.19.
The biggest discount we found is 21% on LavaTap – Fernox F1 Central Heating Inhibitor 500 ml – Inhibitor for Central Heating Systems, Radiator Inhibitor for Rust and Limescale, Improves Flow, Reduces Noise and Heating Bills at Amazon.
The lowest price we found is £12.19 while the highest is £64.99.
Prices for the best Central Heating Antifreeze deals average at £23.70.
Last updated on October 29, 2026.
We scanned these quality online stores and more to deliver you with the best offers online available for Central Heating Antifreeze.