Coolant concentrate that protects the engine against freezing, overheating and corrosion – mixed in a ratio tailored to the climate and application.
HEPU® P999-EVO12 Coolant Concentrate (Violet/Purple)
HEPU® P999-EVO12 is part of the P999 series of HEPU® coolant concentrates for modern cooling systems, from passenger cars to heavy-duty vehicles. Supplied undiluted, it lets the workshop prepare exactly the right mixing ratio for the climate and application, with year-round protection against freezing, overheating and corrosion.
P999-EVO12 is the violet/purple, latest-generation concentrate of the series, built on Si-OAT technology – organic acid technology reinforced with a silicate additive package. It meets the current Volkswagen TL 774-L (G12evo) specification and can also be used for former VAG specifications: TL 774-C (G11) / D (G12) / F (G12+) / G (G12++) / J (G13). Formulated for filled-for-life use in the engine and cooling system. Mixed 1:1 with demineralised water it protects down to −38 °C.
Key features
Made in Germany. Manufactured under strict quality control – consistent and proven.
Latest-generation G12evo / Si-OAT formula. Free from borate, nitrite, amine and phosphate, with a silicate additive package for extra high-temperature aluminium protection.
Filled-for-life coolant. Designed to remain in the engine and cooling system for the vehicle’s service life.
Backward-compatible across the full VAG range. G11, G12, G12+, G12++ and G13 applications where the manufacturer permits.
Permanent all-year protection. Guards against frost, overheating and corrosion under all operating conditions.
Flexible mixing ratio. Supplied as a concentrate; the workshop sets the freeze-protection level.
Broad OE coverage. Volkswagen, Audi, Seat, Škoda, Porsche, Bentley, Bugatti, Lamborghini (TL 774-L), plus MAN 324 SiOAT evo, Deutz and international standards (see Comparable Quality Standards).
Perfect match for HEPU® water pumps. One system, one manufacturer, full responsibility.
Benefits
Reliable engine protection all year round. Against freezing, overheating and corrosion, under all operating conditions.
Advanced Si-OAT protection. Combines long-life organic-acid inhibitors with a silicate package for demanding, high-temperature aluminium engines.
Freeze protection tailored to your needs. As a concentrate, the workshop determines the mixing ratio and level of protection.
Confidence in the right choice. Meets the current G12evo (TL 774-L) requirement of leading manufacturers and covers earlier VAG classes, reducing the risk of incorrect selection.
German quality. One consistent, proven standard behind The Culture of Cooling.
Consistency with the HEPU® system. The perfect complement to HEPU® water pump kits: one system, one manufacturer, full responsibility.
| Parameter | Value |
|---|---|
| Product type | Coolant / antifreeze — G12evo full concentrate (Si-OAT, long-life) |
| Inhibitor | Organic acid technology + silicate additive package |
| Colour | Violet / purple |
| Odour | Characteristic |
| Density at 20 °C | 1.12 g/cm³ |
| pH at 20 °C | ~8.7 |
| Freezing point (concentrate) | Not determined |
| Boiling point | 197 °C |
| Frost protection (1:1 with water) | down to −38 °C |
| Flash point | 111 °C |
| Auto-ignition temperature | 398 °C |
| Flammability | Non-flammable |
| Vapour pressure at 25 °C | 0.1 hPa |
| VOC content | 0.00 % |
| Solubility in water | Miscible |
| Free of | Borate, nitrite, amine, phosphate |
| Recommended for | Latest-generation VAG Group engines (G12evo); filled-for-life systems; high-temperature aluminium protection |
| Application | Engine coolant (mix with water before use) |
HEPU® P999-EVO12 is a concentrate and must be mixed with clean water before filling the cooling system.
Method
Mixing ratio → frost protection
| Concentrate : Water | Frost protection |
|---|---|
| 50 : 50 | −38 °C (verified HEPU figure) |
| ~40 : 60 | ~ −25 °C (approx.) |
| ~60 : 40 | ~ −52 °C (approx.) |
Guidance: keep the concentrate content between 33 % (minimum, for year-round corrosion protection) and 60 % (practical maximum). Higher glycol content does not improve frost protection and reduces heat transfer.
HEPU® P999-EVO12 is recommended for use according to the following specifications and standards:
Backward-compatible with former VAG specifications: TL 774-C (G11) / D (G12) / F (G12+) / G (G12++) / J (G13), where the vehicle manufacturer permits.
Always confirm the coolant type and colour required by the vehicle manufacturer before topping up or mixing with another product.
SAFETY WARNINGS
Hazard-determining components of labelling:
ethanediol
Hazard statements
Precautionary statements
Full details in the Safety Data Sheet (SDS), available for download.
MANUFACTURER AND ENTITY RESPONSIBLE FOR PLACING THE PRODUCT ON THE MARKET
HEPU® Autoteile GmbH
Am Kreuzweg 2, 32689 Kalletal-Hohenhausen
Germany
Safety data sheet / Sicherheitsdatenblatt
Other files / Andere Dateien
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HEPU® Coolant Catalogue
Discover the complete range of HEPU® coolants and coolant concentrates in one catalogue. From high-quality coolant concentrates (P999 series) and ready-to-use coolants (P900 / P888) to windscreen washer fluid, windscreen de-icer and AdBlue – all developed without the addition of nitrites and phosphates and compliant with the specifications of individual vehicle manufacturers.
