BlueDevil Products Red Angel A/C Stop Leak & Conditioner — 2 oz, Permanent Seal with UV Dye

BlueDevil Red Angel A/C Stop Leak & Conditioner is a professional 2 oz. formula that permanently seals leaks in automotive air conditioning systems while conditioning internal components.

Engineered for both DIYers and technicians, this concentrated 2-ounce treatment seals leaks in condensers, evaporators, hoses, gaskets and O-rings without clogging or damaging system parts. The formula stays inactive while circulating through the system and activates only at the site of the leak to form a durable chemical weld. Safe for R-12 and R-134a systems, the product includes a UV dye to help locate and confirm repairs quickly.

How does Red Angel find and seal A/C leaks without clogging components?

The formula remains inert while it travels through the closed system and reacts only where pressure loss or refrigerant contact is present. When it reaches a leak, the chemistry bonds to metal and rubber surfaces, creating a permanent seal without leaving solids or particulates behind.

• Activates at the leak point only, minimizing exposure elsewhere
• No solid or particulate matter to cause blockages or harm recovery equipment
• Forms a chemical weld compatible with metals and elastomers
• Includes UV dye to confirm the sealed area visually

Will this product work with my vehicle’s refrigerant type?

Yes. Red Angel is formulated to be compatible with both R-12 and R-134a systems, making it suitable for older and many newer vehicles. It integrates with existing refrigerant and oil without altering normal system operation.

• Safe for R-12 and R-134a automotive A/C applications
• Mixes with system refrigerant and lubricants without sediment
• Can be used for preventative maintenance as well as repairs

How long does the seal last and does it affect A/C performance?

The seal created by Red Angel is intended to be permanent under normal operating conditions; it bonds with the surfaces around the leak to stop refrigerant loss. Because the formula contains no solids, it does not impede refrigerant flow or interfere with compressors, hoses, expansion valves, or recovery equipment.

• Designed for long-term sealing, not a temporary plug
• Does not crystallize or restrict refrigerant pathways
• Conditions and lubricates internal components to reduce wear

How is the product applied and how will I know the leak is repaired?

Application is straightforward: introduce the 2 oz. bottle into the A/C system per package directions using an appropriate dispensing method or adapter. The built-in UV dye makes it easy to inspect the suspected area under UV light to verify the seal.

• Apply through service port or recommended adapter following instructions
• Use UV light to detect dye and confirm leak location and repair
• Recommended for both single-point repairs and preventive treatments

Who this is for: BlueDevil Red Angel A/C Stop Leak & Conditioner is intended for vehicle owners, fleet managers and automotive technicians who need a reliable, low-risk method to stop refrigerant leaks without dismantling the system. It’s a practical choice when you want a permanent-seal approach that’s safe for common refrigerants, won’t clog components, and simplifies leak verification with UV dye.