Request a catalogue

Available Catalogues

Category

Show Less

Brand

  1. Castrol (1)
  2. Design Engineering (5)
  3. Frost (1)
  4. Liqui Moly (2)
  5. Millers Oils (2)
  6. Mishimoto (1)
  7. Motul (2)
  8. Red Line (4)
  9. Ring (1)
  10. VP Racing (1)
  11. VR-12 (1)
Show Less

Size

  1. 118ml (1)
  2. 2 Quart (1.9 Litre) (1)
  3. 250ml (2)
  4. 3.78 Litre (2)
  5. 1 Litre (2)
  6. 150ml (1)
  7. 20 Litre (1)
  8. 300ml (1)
  9. 355ml (1)
  10. 473ml (7)
  11. 5 Litre (1)
  12. 500ml (1)
  13. 60 Litre (1)
Show Less

Promo Badge

  1. New (1)

Price

¥633 ¥31078

Category

Showing All

Brand

Showing All

Size

Showing All

Promo Badge

Showing All

Price

Showing All

Coolant Additives

Showing 21 of 21 items
Filter
Red Line Water Wetter Super Coolant
JP¥2,821 Ex VAT JP¥2,821 INC VAT
Motul Mocool Coolant Additive
JP¥2,248 Ex VAT JP¥2,248 INC VAT
Ring UV Dyes
From JP¥633 Ex VAT From JP¥633 INC VAT
VP Racing Madditive Cool Down
JP¥2,220 Ex VAT JP¥2,220 INC VAT
Millers Oils Red Alpine Anti Freeze Summer Coolant
From JP¥636 Ex VAT From JP¥636 INC VAT
Millers Oils Extra Cool
JP¥2,072 Ex VAT JP¥2,072 INC VAT
VR-12 Coolant Additive
JP¥2,081 Ex VAT JP¥2,081 INC VAT
Frost Stay Cool Coolant Additive
JP¥2,905 Ex VAT JP¥2,905 INC VAT
Liqui Moly Radiator Stop Leak
JP¥677 Ex VAT JP¥677 INC VAT
Design Engineering Radiator Relief
JP¥1,637 Ex VAT JP¥1,637 INC VAT
Mishimoto Radiator Coolant Liquid Chill
JP¥2,775 Ex VAT JP¥2,775 INC VAT
Design Engineering Heater Hotter
JP¥1,656 Ex VAT JP¥1,656 INC VAT
Design Engineering Chill Charger
JP¥1,656 Ex VAT JP¥1,656 INC VAT
Motul Auto Cool G13 Ultra Coolant (Concentrate)
From JP¥31,078 Ex VAT From JP¥31,078 INC VAT
Design Engineering Radiator Relief Flush
JP¥1,656 Ex VAT JP¥1,656 INC VAT
New
Castrol Radiator Cleaner
JP¥722 Ex VAT JP¥722 INC VAT
Showing 21 of 21 items
Filter

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.