Product details
Silverhook D/ISHA1 Concentrated Antifreeze Coolant, 1 Litre, Blue
Looking for a reliable antifreeze that’ll keep your engine ticking over through the coldest spells? The Silverhook D/ISHA1 concentrated antifreeze coolant is just the ticket, protecting your engine down to a frosty -36°C. This blue coolant is straightforward to use — no messing about with complicated mixes — but since it’s concentrated, you can dilute it to suit your car and local weather conditions.
Why Pick This Antifreeze?
It’s not just about getting through winter; it’s about keeping your engine in top nick all year round. Thanks to its low viscosity, this coolant flows smoothly through your engine’s cooling system, cutting down on wear and tear. That’s a proper win if you want to dodge pricey repairs or overheating dramas. Plus, the bright blue colour makes spotting leaks or when it’s time for a top-up a doddle.
Technical Specs & Compatibility
Comes in a neat 1-litre bottle — perfect for topping up or for smaller motors. Weighing just over half a kilo, it’s a handy size that fits nicely on your garage shelf. With model and part number D/ISHA1, you can be sure you’re getting the genuine Silverhook deal.
- Protects down to -36°C — ideal for those biting UK winters and beyond.
- Concentrated formula lets you mix with distilled water to match your engine’s needs and climate.
- Low viscosity ensures quicker circulation and better heat transfer inside your engine.
- All-year-round protection guards against corrosion and overheating.
- Distinctive blue colour for easy spotting and monitoring.
- Compact 1-litre size helps avoid waste and suits most family cars.
- Made by Silverhook — a trusted name in automotive fluids.
Of course, it’s always worth double-checking your vehicle’s handbook or having a quick word with your mechanic if you’re unsure about what type of coolant your car needs. Some of the newer motors might call for specific standards, but this Silverhook antifreeze fits a wide range of engines. Whether you’re topping up after a service or gearing up for winter, it keeps your engine purring along without any faff.
So, if you want a straightforward, effective antifreeze that’s easy to use and keeps your engine safe when the mercury drops, the Silverhook D/ISHA1 concentrated blue antifreeze is a cracking choice. No more fretting about frozen coolant or overheating — just solid, reliable protection whenever you need it.

