MayhemsCoolant Dye - Original Series - Intense Colour, UV Flourescent, 15 ml, Clear Blue

This product it advertised to react under some elements, those including like know UV Light or Blacklight. Unfortunate this product or its damage or its some other chemical. I have tested this product under a black bulb but have cero reaction still the same color as before with no changes. I also order 2 strips UV led light via amazon with UV light and the result was worse than the Blacklight. So, I came to the conclusion that the product its defective. I request from this seller a return because its defective and the cost of send it back its above the price of the product. Hope this seller its more reasonable. A real reaction with UV Dye for auto coolant.

Pictures don’t do this product justice. If you use it make sure you have stuff to clean up any excess because this stuff GLOWS BRIGHT