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The NUCAL-4050-21 is a refrigerant system leak sealant with integrated UV dye, designed for use in air conditioning and refrigeration systems. It seals small leaks in evaporator coils, condenser coils, and associated refrigerant circuit components. The UV dye component allows technicians to locate sealed or active leak sites using a UV lamp during service calls. HVAC technicians and refrigeration service pros install this product as part of a leak repair workflow, typically alongside refrigerant recovery and recharge procedures.
This product is suited for residential and light commercial HVAC and refrigeration applications where small refrigerant leaks are present and coil or line replacement is not immediately feasible. It is injected into the refrigerant circuit and circulates with the refrigerant to locate and seal leak points. The UV dye remains in the system, allowing future leak checks with a UV light source.
Designed as an OEM-style treatment for residential and light commercial air conditioning and refrigeration systems with minor refrigerant circuit leaks.
Installation is performed by a licensed HVAC technician following all applicable federal and local refrigerant handling regulations, including EPA Section 608 requirements. Power down the system and recover refrigerant as required before accessing the refrigerant circuit. Inject per the manufacturer instructions using appropriate refrigerant service equipment. Use a UV lamp after injection to verify leak sealing and to identify any remaining active leak sites.
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