Supercool Car Radiator Coolant Cooling System Leak Detector Dye 29.5ml

It does the job perfectly and you can find your leaks easy

Works really well, even without a black light you can clearly see the leaks, recommend.

Did exactly what it was supposed to do. Works best when you check at night using a black light torch (only needs a small torch) Confirmed my thoughts and proved the garage wrong (saved me a lot of time and money).

Excellent, but beware it shows leaks you didn’t know you had.

Expensive for the quantity, but it did the job. Found my leak immediately. Bought a UV lamp to assist detection but didn't need it as the dye is so bright.

Good quality dye, not much more to say. Got it to find a leak in my cooling system and found 4! So yeah, works as advertised.

Expensive but does the job. Can be sometimes viewed without a UV torch if leak is big enough but UV at night really amplifies the effect.

Very good product. Helpful I find leak in 5 min

Sooooo very concentrated and BRIGHT. This product helped me diagnose a gremlin in my coolant system. 5/5 stars, great product.

The only Radiator specific dye that i could find. All others are for oil and are not compatible with coolant. It works amazing and it glows really bright fluorescent yellow under 365nm uv light form a cheap torch. The ammpount was more than enough for a very large LR4 V8 with dual AC system.

This stuff worked great, one ounce was more than enough. For those who said the product didn’t fluoresce in the bottle, I believe it needs to mix with the coolant/water to really light up. Remember this is to be used with a black light/UV light to see the leak. While it was bright enough to see some areas with no artificial UV light, it is ideally used with a UV light. Super bright for me, showed the leak clearly and was in an area that I never would have thought of or found without the leak detector.

Very strong, only need a little bit to make all of the coolant extremely uv visible. Helped me find my leak

I had a coolant leak. My mechanic said that they couldn't determine where the leak was because it was very slow. After a while, the rate of leaking increased. Rather than using a leak-seal product, I wanted a real fix, so I added this dye and drove around. My mechanic said that the dye made it very easy to see where the leak was. This saved a considerable amount of diagnostic time... and saved me a considerable money. It was really easy to use. The only issue was that my mechanic said that the dye had made a mess on the bottom side of my truck.