ERRECOM Brilliant Coolant – 100 ml, Car Radiator Coolant Cooling System UV Leak Detector Dye

ERRECOM Brilliant Coolant does exactly what it promises. The dye mixes easily with the coolant, shows up clearly under UV light, and makes even small leaks quick to identify. A small 100 ml bottle goes a long way and can save hours of guesswork when diagnosing cooling system issues. Reliable, simple, and very effective.

Worked as it should. Supplied UV torch highlighted areas where the dye was.

Overall this is very good. It definitely helped locate the leak I had. It would have got 5 stars but it can be a little tricky to see sometimes.

There's loads of liquid here, you only use a bit. With a cheap ultraviolet torch from Amazon I found my 1 leak and glad to say there was only that 1. This stuff does exactly what you expect it too. The leak was in a hard to spot area where no daylight can reach so with the ultraviolet torch this stuff stood out well, nice bright reflection. It will last for a long time this bottle as there's so much in it. I nearly poured the bottle in, good job I read the instructions. Incredible value for money tbh, I've let somebody else use it on their car too with similarly excellent results. The only thing negative was the bottle leaked in transit so I had to take it out of the packaging in the sink with the tap on but only a little bit had come for m under the lid and the packaging had taken a beating too.

Ideal to find the leak in coolant system, dose to the recommended amount and using a uv torch it glows where the leak is. Enough to do multiple systems, advice go around the coolant hoses and engine area with uv light before dosing, then after adding the fluid as items glow even when no leak present so you will see exactly where a new glowing area leak actually is

Bottle had a leak. Other items were damaged because of this