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Coolant Additives

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Motul Mocool Coolant Additive
€13.61 Ex VAT €16.33 ALL TAXES PAID
Red Line Water Wetter Super Coolant
€17.08 Ex VAT €20.50 ALL TAXES PAID
Ring UV Dyes
From €3.83 Ex VAT From €4.60 ALL TAXES PAID
Red Line Supercool Fortified With Water Wetter (Premix)
€43.68 Ex VAT €52.42 ALL TAXES PAID
VP Racing Madditive Cool Down
€13.44 Ex VAT €16.13 ALL TAXES PAID
Millers Oils Red Alpine Anti Freeze Summer Coolant
From €3.85 Ex VAT From €4.62 ALL TAXES PAID
Millers Oils Extra Cool
€12.54 Ex VAT €15.05 ALL TAXES PAID
VR-12 Coolant Additive
€12.60 Ex VAT €15.12 ALL TAXES PAID
Liqui Moly Radiator Cleaner Coolant System Additive
€4.17 Ex VAT €5.00 ALL TAXES PAID
Frost Stay Cool Coolant Additive
€17.58 Ex VAT €21.10 ALL TAXES PAID
Liqui Moly Radiator Stop Leak
€4.10 Ex VAT €4.92 ALL TAXES PAID
Design Engineering Radiator Relief
€9.91 Ex VAT €11.89 ALL TAXES PAID
Motul Auto Cool G13 Ultra Coolant (Concentrate)
From €188.15 Ex VAT From €225.78 ALL TAXES PAID
Design Engineering Chill Charger
€10.02 Ex VAT €12.02 ALL TAXES PAID
Mishimoto Radiator Coolant Liquid Chill
€16.80 Ex VAT €20.16 ALL TAXES PAID
Design Engineering Heater Hotter
€10.02 Ex VAT €12.02 ALL TAXES PAID
Design Engineering Radiator Relief Flush
€10.02 Ex VAT €12.02 ALL TAXES PAID
Design Engineering Radiator Relief For Diesel Vehicles
€10.44 Ex VAT €12.53 ALL TAXES PAID
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Additives are some of the most effective, yet frequently overlooked fluids you can put into a car. Coolant additives, in particular, are often forgotten in favour of the more widely used fuel and oil treatments, but they play a vital role in motorsport.

As a natural by-product of their operation, car engines produce a large amount of heat. In racing conditions, as you can imagine, the engine gets very hot indeed and is often at risk of overheating leaving you forced to retire from the race or back to the pits for some urgent work.

To combat this increase in heat and to maintain the perfect operating temperature, most engines feature a cooling system which pumps a special fluid around the inside of the engine and through a radiator. As regular water starts to boil at 100 degrees Celsius, either ethylene or propylene glycol is added to lower the boiling point and keep the fluid more stable. In order to keep your engine at a cool operating temperature and working how you want it to from lights out to the chequered flag, browse the full range of engine coolant additives available at Demon Tweeks today featuring additives from Red Line, Motul, Millers Oils and more top brands.