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
( 350 )

£13.99

ex. VAT £11.66 Each

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20+ available for delivery

Sentinel Sentinel
( 44 )

£14.48

ex. VAT £12.07 Each

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20+ available for delivery

Sentinel Sentinel
( 19 )

£19.98

ex. VAT £16.65 Each

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Out of stock for delivery

Fernox
25% Off
( 178 )

£14.48 was £19.98

ex. VAT £12.07 Each

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20+ available for delivery

Fernox
( 15 )

£19.98

ex. VAT £16.65 Each

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20+ available for delivery

ADEY
( 41 )

£109.98

ex. VAT £91.65 Each

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13 available for delivery

Corgi Controls
( 30 )

Product code: 54401

Corgi Leak Sealer 1L

£12.58

ex. VAT £10.48 Each

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20+ available for delivery

Fernox
30% Off
( 37 )

£13.28 was £18.98

ex. VAT £11.07 Each

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14 available for delivery

Fernox
20% Off
( 150 )

£15.98 was £20.48

ex. VAT £13.32 Each

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3 available for delivery

Calmag
( 212 )

£10.98

ex. VAT £9.15 Each

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20+ available for delivery

Corgi Controls
( 79 )

£7.68

ex. VAT £6.40 Each

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Out of stock for delivery

Corgi Controls
( 188 )

Product code: 38235

Corgi System Inhibitor 1L

£12.58

ex. VAT £10.48 Each

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20+ available for delivery

Sentinel
( 49 )

£16.98

ex. VAT £14.15 Each

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12 available for delivery

Fernox
( 211 )

£6.28

ex. VAT £5.23 Each

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20+ available for delivery

ADEY
( 3 )

£15.98

ex. VAT £13.32 Each

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5 available for delivery

Fernox
( 101 )

£19.98

ex. VAT £16.65 Each

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Out of stock for delivery

Sentinel
( 72 )

£17.98

ex. VAT £14.98 Each

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20+ available for delivery

ADEY
( 70 )

£154.98

ex. VAT £129.15 Each

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20+ available for delivery

Fernox
( 135 )

£16.98

ex. VAT £14.15 Each

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20 available for delivery

Fernox
( 32 )

Product code: 50252

Fernox Powerflow Flux 100g

£8.68

ex. VAT £7.23 Each

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20+ available for delivery

Sentinel
( 54 )

Product code: 87634

Sentinel Leak Sealer 1L

£17.98

ex. VAT £14.98 Each

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6 available for delivery

ADEY
( 19 )

£23.48

ex. VAT £19.57 Each

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9 available for delivery

ADEY
( 13 )

£499.98

ex. VAT £416.65 Each

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Out of stock for delivery

Fernox
( 23 )

£24.48

ex. VAT £20.40 Each

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3 available for delivery