How long does it take for AC dye to work?

AC leak detector dye can work in a matter of minutes. Then again, it could take hours or even days for the dye to leak out. It all depends on the severity of the leak. When the UV dye emerges from a leak in a refrigerant hose or other component, it will leave a fluorescent mark that is visible under black light. Sometimes, when the leak is minor, it takes quite a while for enough dye to make a mark. Generally speaking, the greater the refrigerant leak, the faster the dye will appear outside the system.

How long does AC leak dye last?

The UV dye used to diagnose a leak in your vehicle’s AC system is mixed with the refrigerant. The dye will last as long as the refrigerant remains in the system, until it either leaks out completely or is evacuated by a technician. AC leak dye does not deteriorate or fade and can remain in the refrigerant circuit for the life of the system without causing harm.

Do AC leak sealants work?

Certain products on the market are promoted to repair refrigerant leaks. While consumer reactions are mixed regarding the use of AC leak sealants, many technicians advise against their use. That is due to the possibility that the sealant will unintentionally clog passageways inside the refrigerant circuit. These passageways need to remain open, otherwise extensive damage can occur to your AC system. Some repair facilities will even charge a premium to service vehicles that have previously had AC sealant introduced into the refrigerant, due to the need for special procedures to evacuate the contaminated refrigerant in the system.