Central Heating Additives

Shop high-quality central heating additives from trusted brands like Fernox, Sentinel, Adey and Corgi Controls. At Toolstation, we stock a wide range of central heating cleaners to keep your system running smoothly.

Types of Central Heating Additives


Central heating cleaner removes corrosion and scale to improve the efficiency and longevity of both old and new systems. Regular cleaning can also help reduce boiler noise or use boiler silencer fluid after cleaning for longer-lasting results.

Choose a central heating inhibitor to protect newly cleaned systems against corrosion or limescale build-up whilst extending the life of your system and reducing fuel usage. If your boiler is leaking and losing pressure, try a central heating leak sealer to address the problem quickly.
Sentinel Sentinel / Sentinel X400 Sludge Remover 1L
15% Off
( 53 )

£21.78 was £26.78

ex. VAT £18.15 Each

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Adey Adey / Adey MC1+ Central Heating Inhibitor 500ml
10% Off
( 13 )

£20.68 was £22.98

ex. VAT £17.23 Each

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Sentinel Sentinel / Sentinel X100 System Inhibitor Rapid Dose 300ml
30% Off
( 34 )

£17.48 was £25.28

ex. VAT £14.57 Each

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Adey Adey / Adey MC3 Central Heating Cleaner 500ml
10% Off
( 3 )

£14.38 was £15.98

ex. VAT £11.98 Each

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Sentinel Sentinel / Sentinel X300 Cleaner for New Systems 1L
20% Off
( 5 )

£16.18 was £21.18

ex. VAT £13.48 Each

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Adey Adey / Adey MC5 Rapid Flush Cleaner 500ml
10% Off
( 3 )

£22.48 was £24.98

ex. VAT £18.73 Each

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Calmag Calmag Calmag / Central Heating Cleanser / Descaler & Inhibitor
( 183 )

£10.98

ex. VAT £9.15 Each

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Fernox Fernox / Fernox F1 Central Heating Inhibitor & Protector 500ml
( 147 )

£19.98

ex. VAT £16.65 Each

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Corgi Controls Corgi Controls / Corgi Boiler Noise Silencer 1L
( 7 )

£12.58

ex. VAT £10.48 Each

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Sentinel Sentinel / Sentinel X100 System Inhibitor 1L
( 269 )

£18.98

ex. VAT £15.82 Each

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Sentinel Sentinel / Sentinel X800 Fast Acting Cleaner 1L
( 35 )

£19.98

ex. VAT £16.65 Each

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Fernox Fernox / Fernox F1 Central Heating Inhibitor & Protector Express 400ml
( 130 )

£20.48

ex. VAT £17.07 Each

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Adey Magnaclean Adey Magnaclean / Adey MagnaClean Professional 1 Chemical Pack 22mm
( 38 )

£109.98

ex. VAT £91.65 Each

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Sentinel Sentinel / Sentinel Boiler Noise Reducer 1L
( 42 )

£16.98

ex. VAT £14.15 Each

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Sentinel Sentinel / Sentinel Leak Sealer 1L
( 44 )

Product code: 87634

Sentinel Leak Sealer 1L

£17.98

ex. VAT £14.98 Each

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Corgi Controls Corgi Controls / Corgi Universal Cleanser 1L
( 21 )

Product code: 37524

Corgi Universal Cleanser 1L

£12.58

ex. VAT £10.48 Each

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Corgi Controls Corgi Controls / Corgi System Inhibitor 500ml Concentrate
( 55 )

£7.68

ex. VAT £6.40 Each

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Adey Magnaclean Adey Magnaclean / Adey MagnaClean Professional 2 Chemical Pack 22mm
( 50 )

£154.98

ex. VAT £129.15 Each

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Fernox Fernox / Fernox LS-X External Leak Sealer 50ml
( 153 )

£6.28

ex. VAT £5.23 Each

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Corgi Controls Corgi Controls / Corgi System Inhibitor 1L
( 158 )

Product code: 38235

Corgi System Inhibitor 1L

£12.58

ex. VAT £10.48 Each

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Fernox Fernox / Fernox F4 Central Heating Leak Sealer Express 400ml
( 87 )

£19.98

ex. VAT £16.65 Each

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Fernox Fernox / Fernox F4 Central Heating Leak Sealer 500ml
( 120 )

£16.98

ex. VAT £14.15 Each

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Adey ProCheck® Test Kit

Product code: 49298

Adey ProCheck® Test Kit

£134.98

ex. VAT £112.48 Each

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Fernox Fernox / Fernox Powerflow Flux 100g
( 26 )

Product code: 50252

Fernox Powerflow Flux 100g

£8.68

ex. VAT £7.23 Each

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