Stop micro-leaks in AC & refrigeration systems. Universal HVAC leak sealer with 45° swivel adapter for easy access. Compatible with all refrigerants.

Twelve pre-charged 0.25 oz syringes of HCPRO Performance HCLEAK12B HVAC-R Leak Sealer — built for HVAC contractors running maintenance contracts, mini-split service routes, and high-volume residential or light-commercial A/C work. Each syringe seals one micro-leak or pre-treats one system. One kit covers a full year of PM for a 12-unit account or a half-year of week-on-week service calls.

What's in the kit

12 individually sealed 0.25 oz refrigerant-soluble sealant syringes plus one re-usable 45° swivel low-side adapter. Pre-charged formula injects directly into the running system through the low-side service port — no pump-down, no recovery, no system disassembly. The 45° swivel adapter accesses tight low-side ports on condensers, mini-split outdoor units, and packaged rooftops. Universal compatibility with R-410A, R-22, R-32, R-134a, R-1234yf, R-404A, R-407C, R-290, and R-600. Compatible with POE, mineral, PAG, and alkylbenzene oils.

Who it's built for

HVAC service contractors, refrigeration techs, mini-split installers, property maintenance managers, and shops running annual PM contracts on residential or light-commercial systems. Especially useful for technicians keeping aging R-22 equipment alive while customers budget for retrofit.

When to use it — repair AND preventive maintenance

Active repair: Inject one syringe when a system has lost pressure over weeks or months but the leak isn't visible at the coil or fitting. Refrigerant-soluble formula migrates to the leak point and seals from inside the system.

Preventive maintenance — the main reason this ships in 12-packs: Inject one syringe during annual or seasonal service to seal pinhole leaks before they cause callbacks. Standard practice on PM contracts for restaurants, walk-in cold rooms, mini-split installations, rental property HVAC, and aging R-22 equipment that's hard to retrofit. A proactive seal at $8 per dose prevents a $1,500 to $3,000 compressor or coil failure 18 months later.

Why it works

Pre-charged refrigerant-soluble chemistry circulates with the refrigerant and reacts ONLY at leak points where it contacts atmosphere — it does NOT clog TXVs, orifices, or evaporator coils like cheap stop-leak products. Anti-corrosion additive package prevents the underlying corrosion that caused the leak from spreading. Rated to 800 PSI for high-pressure R-410A systems. Manufactured in the USA to OEM-spec quality control.

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