LF3001 Automotive Engine Coolant Leak Detection Dye, Services Radiators, Hoses, Heater Cores, Water Pumps, (6) 1oz Ultraviolet Fluorescent Dye Bottles, Made in USA

This coolant dye worked great and I received it fast. It was easy to see with the yellow glasses and black light I purchased separately. Unfortunately, I had to put it in the shop as the repair was bigger than I wanted to deal with but it helped me diagnose the issue.

¡¡El producto es excelente y funciona tal cual lo describen!! No importa el color del coolant se utilice, el producto lo tiñe de un verde fluorescente. Hay que tener mucho cuidado con no mancharse o derramarlo al momento de colocarlo dentro del tanque de reserva del radiador, y al utilizarlo junto con una luz negra y lentes amarillos se pueden apreciar los puntos de fuga del radiador.

Allowed me to pinpoint a coolant leak that had plagued me for months. A hot EGR valve had burned through a firewall heater hose. The hot valve vaporized the coolant. That’s why there was never any obvious coolant on the engine or on the driveway . The dye showed me exactly where that elusive leak was. I replaced the heater hose and problem solved. I would have never found that darn leak without this product. Used a UV light to light up the dye. The leak stood out like a beacon. A Plus rating on this product.

This helped me confirm it was my water pump that was leaking.

This dye work wonderfully, highly recommend this product.

Makes it hard when you're tracking multiple leaks and all of the dyes are similar. Also, the stuff is quite pricey.

It does what it says. I was able to confirm my coolant leak is not external and continue investigating.I suggest using something to siphon some of the coolant out of the radiator to make room for the product.

Pour the entire 1 0z in a cold engine......run the vehicle till operating temperature.......use a special light ( not included ) to find the antifreeze mixed with the solution. Very easy to use.