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  1. Design Engineering (4)
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Price

44 663

Coolant Additives

Showing 19 of 19 items
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Red Line Water Wetter Super Coolant
 
 
SEK 199.01 Ex VAT SEK 248.76 ALL TAXES PAID
Buy now, pay later with Klarna
Ring UV Dyes
 
 
From SEK 44.63 Ex VAT From SEK 55.79 ALL TAXES PAID
Klarna available on baskets over £99
Red Line Supercool Fortified With Water Wetter (Premix)
 
 
SEK 508.95 Ex VAT SEK 636.19 ALL TAXES PAID
Buy now, pay later with Klarna
Red Line Supercool Performance Coolant With Water Wetter
 
 
SEK 339.30 Ex VAT SEK 424.13 ALL TAXES PAID
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Red Line Supercool Fortified With Water Wetter (Concentrate)
 
 
SEK 662.29 Ex VAT SEK 827.86 ALL TAXES PAID
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Millers Oils Extra Cool
 
 
SEK 155.82 Ex VAT SEK 194.78 ALL TAXES PAID
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VP Racing Madditive Cool Down
 
 
SEK 156.60 Ex VAT SEK 195.75 ALL TAXES PAID
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Design Engineering Radiator Relief
 
 
SEK 115.49 Ex VAT SEK 144.36 ALL TAXES PAID
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VR-12 Coolant Additive
 
 
SEK 146.81 Ex VAT SEK 183.51 ALL TAXES PAID
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Design Engineering Radiator Relief Flush
 
 
SEK 116.80 Ex VAT SEK 146.00 ALL TAXES PAID
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Millers Oils Red Alpine Anti Freeze Summer Coolant
 
 
From SEK 47.79 Ex VAT From SEK 59.74 ALL TAXES PAID
Klarna available on baskets over £99
Design Engineering Chill Charger
 
 
SEK 116.80 Ex VAT SEK 146.00 ALL TAXES PAID
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Mishimoto Radiator Coolant Liquid Chill
 
 
SEK 234.64 Ex VAT SEK 293.30 ALL TAXES PAID
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Motul Mocool Coolant Additive
 
 
SEK 158.56 Ex VAT SEK 198.20 ALL TAXES PAID
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Evans Vintage Cool 180 Degree (Waterless Engine Coolant)
 
 
From SEK 324.95 Ex VAT From SEK 406.19 ALL TAXES PAID
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Lucas Oil Super Coolant
 
 
SEK 162.78 Ex VAT SEK 203.48 ALL TAXES PAID
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Frost Stay Cool Coolant Additive
 
 
SEK 183.09 Ex VAT SEK 228.86 ALL TAXES PAID
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Design Engineering Heater Hotter
 
 
SEK 116.80 Ex VAT SEK 146.00 ALL TAXES PAID
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Motul Auto Cool G13 Ultra Coolant (Concentrate)
 
 
From SEK 604.48 Ex VAT From SEK 755.60 ALL TAXES PAID
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Showing 19 of 19 items
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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.