blueseal A/C Stop Leak for R-1234yf, 1.25oz Single Dose — Non-Polymer, UV Dye & Non‑Clogging Sealant

BlueSeal A/C Stop Leak is a non-polymer, mineral-oil based sealant formulated to stop slow refrigerant loss in R-1234yf automotive A/C systems while including a professional-grade UV dye for fast leak detection.

If your air conditioning keeps losing cooling power after repeated recharges, BlueSeal provides a targeted, single-bottle solution made for modern R-1234yf systems. The low-viscosity, non-polymer formula bonds when exposed to oxygen under system pressure and is designed to seal common leak locations—evaporators, condensers, rubber hoses, O-rings and gaskets—without leaving solids that can clog expansion devices or recovery equipment.

How does BlueSeal stop slow A/C leaks without clogging the system?

The formula uses a mineral-oil carrier and reactive components that polymerize only at leak sites where air contacts refrigerant under pressure. Because it’s non-polymer and stays fluid until bonding, it avoids forming particulates that can block TXVs, expansion valves, or recovery machines.

• Non-polymer, mineral oil base—keeps internal passages clear.
• Bonds at oxygen exposure points—targets actual leak locations.
• No solid residues—compatible with recovery and service equipment.
• Conditions aged rubber to reduce repeat leaks.

Will one 1.25oz bottle treat my vehicle and what types of leaks does it address?

Each 1.25oz bottle is formulated to treat a single vehicle using R-1234yf refrigerant and is effective on small, slow leaks—typically systems losing up to moderate annual amounts. It seals common failure points across the circuit and includes UV dye to reveal larger leaks that need mechanical repair.

• Single-vehicle dose—1.25oz per application.
• Works on evaporator cores, condensers, hoses, gaskets, and O-rings.
• Lab-tested on systems with modest refrigerant loss for reliable results.
• UV dye integrated—no separate leak tracer required.

How long does the seal last and does the product prevent future leaks?

BlueSeal forms durable bonds at leak points and remains active in the system after initial sealing. The chemistry is designed to form new bonds if air later enters the circuit, helping reduce recurrence from the same weak spots, though large mechanical failures still require component replacement.

• Remains active after sealing to address later air ingress.
• Conditions dried or aging seals to prolong service life.
• Not a substitute for major component repair—use for slow leaks.
• Compatible only with R-1234yf systems—do not use in R-134a vehicles.

Who this is for: BlueSeal A/C Stop Leak is intended for vehicle owners, independent mechanics, fleet managers, used car dealers, and auto shops that service R-1234yf systems and want a documented, professional option to stop slow refrigerant loss without introducing solids into the A/C circuit. It’s ideal when a system is losing small amounts of refrigerant repeatedly and you need a single-dose, field-ready product with integrated UV dye to locate leaks quickly. Manufactured in the USA and formulated specifically for R-1234yf applications, this bottle is not suitable for R-134a systems.