HIGHTEC ANTIFREEZE COOLANT AN 18 LC is a ready-to-use premium long-life coolant built on a monoethylene glycol base with Si-OAT lobrid technology. It is supplied pre-mixed for frost protection down to -40 C and delivers high corrosion and frost protection straight from the bottle. The nitrite-, amine- and phosphate-free formula protects both aluminium and cast iron engines.

Purpose and specifications

Designed for the cooling systems of modern passenger cars and commercial vehicles that call for a long-life silicate-organic coolant. It is approved to VW TL 774-G(12++), VW TL J(G13), VW TL L(G12Evo), MB 325.3, MB 326.3, MAN 324 Si-OAT and BMW LC-18, and meets ASTM D3306, ASTM D6210 and SAE J1034.

• 1.5L container for a complete cooling system refill or top-up
• Reliable frost protection down to around -40 C with boil-over reserve in summer heat
• Long-life corrosion inhibitors guard the radiator, water pump and aluminium components
• Nitrite-, amine- and phosphate-free chemistry for clean, deposit-free circuits

When to use / change?

Choose it when a G12++/Si-OAT long-life coolant is specified or as a like-for-like top-up. As a ready mix it is poured in undiluted. Replacement is typically recommended every 5 years or per the service schedule, with an effective protection range of roughly -40 C to +120 C under pressure. Unopened shelf life is approximately 5 years when stored cool and sealed.

Frequently asked questions

Do I need to dilute this coolant with water?
No. It is a ready-mix already balanced for -40 C, so it is poured in undiluted.

Can I mix it with my existing coolant?
For best results flush and refill. If topping up, combine only with a coolant of the same Si-OAT/G12++ technology.

Is it safe for aluminium engines?
Yes, it is explicitly formulated to protect aluminium and cast iron alike, and it is nitrite-, amine- and phosphate-free.

Suitable for: Volkswagen Passat, Audi A4, BMW 3 Series, Mercedes-Benz C-Class, MAN trucks. Always verify the exact approval against your vehicle's owner manual before use.