Coolant concentrate that protects the engine against freezing, overheating and corrosion – mixed in a ratio tailored to the climate and application.
HEPU® P999-HD48 Coolant Concentrate (Heavy-Duty, Blue-Green)
HEPU® P999-HD48 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-HD48 is the blue-green, heavy-duty concentrate of the series, based on monoethylene glycol with additional anti-corrosion additives. It is specially designed for year-round use in commercial vehicles with their extended thermal requirements, giving optimum protection to the entire cooling system. Mixed 1:1 with demineralised water it protects down to −38 °C.
Key features
Benefits
| Parameter | Value |
|---|---|
| Product type | Coolant / antifreeze — heavy-duty full concentrate (long-life) |
| Base | Monoethylene glycol (ethanediol) 85–95 % |
| Inhibitor | Organic/hybrid anti-corrosion additive package |
| Colour | Blue-green |
| Odour | Odourless |
| Density at 15 °C | 1.127 g/cm³ |
| pH at 20 °C | ~8.7 |
| Freezing point (concentrate) | Not determined |
| Boiling point | 160–200 °C |
| Frost protection (1:1 with water) | down to −38 °C |
| Flash point | > 120 °C |
| Flammability | Non-flammable |
| Vapour pressure at 20 °C | < 0.1 hPa |
| Solubility in water | Fully miscible |
| Free of | Borate, nitrite, phosphate, 2-ethylhexanoic acid |
| Recommended for | Commercial vehicles with extended thermal requirements |
| Application | Engine coolant (mix with water before use) |
HEPU® P999-HD48 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.
Comparable quality standards
HEPU® P999-HD48 is recommended for use according to the following specifications and standards:
Always confirm the coolant type and colour required by the vehicle manufacturer before topping up or mixing with another product.
HEPU® P999 is recommended for use according to the following specifications and standards:
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
All HEPU Tech Academy materials are published on the HEPU® YouTube channel – free of charge, organised into structured series and useful at every stage of the repair process. At the workstation, before starting a repair. At the counter, when a customer asks a question. On a mobile device between jobs.
Subscribe to the channel to stay up to date with the latest installation procedures, new product developments and technical case studies.
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.
