FJC 4916 Universal A/C Dye 4oz for Leak Detection

The FJC 4916 Universal A/C Dye is a professional-grade fluorescent leak detection dye designed to help identify leaks in automotive air conditioning systems. This 4-ounce bottle contains concentrated dye that works with all refrigerants including R-134a, R-1234yf, and older R-12 systems.

Key Features:

• Universal compatibility with all automotive A/C refrigerants and PAG, ester, mineral, and paraffin-based lubricants
• Highly concentrated fluorescent formula for maximum visibility under UV light
• Safe for all A/C system components including seals, hoses, and compressors
• 4-ounce bottle treats multiple vehicles
• Easy injection through low-side service port
• Remains in system for ongoing leak detection

Simply inject the dye into the A/C system, run the system to circulate, then use a UV leak detection lamp to pinpoint even the smallest leaks. The bright fluorescent dye glows brilliantly under UV light, making leak location fast and accurate. Professional technicians and DIY mechanics trust FJC products for reliable A/C system diagnostics and service.