Supercool Car Radiator Coolant Cooling System Leak Detector Dye 29.5ml

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).

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

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.

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.

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

Great product. Put the bottle in the coolant and then the next day it showed up where my leak was.

Great Easy to use

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.

Works good, found puddle under my thermostat housing and made noticing the weep hole spewing water from my pump a lot easier. Very bright and could instantly notice it after running the car for a couple of minutes.

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