TSI Supercool 1 oz Leak Stop & U/V Dye — HFC‑Free aerosol, non‑polymer seal for small A/C leaks

TSI Supercool 39241B Total Leak Stop and U/V Dye is a 1-ounce, HFC-free aerosol treatment that locates and seals small refrigerant leaks in vehicle A/C systems without polymers.

This compact retail can combines a fluorescent U/V dye for leak detection with a non-polymer sealing formula designed to stop minor leaks in evaporators, condensers, hoses, gaskets, and O-rings. Packaged as a single-can, one-vehicle treatment and shipped with an adapter for easy application, the product uses TSI Supercool’s patented HFC-free aerosol technology (US Patent No. 8,047,009) to minimize risk of component clogging and to remain compatible with system recovery and reclamation equipment.

How does it identify leaks in my car’s A/C system?

The formula includes a fluorescent U/V dye that travels with the refrigerant and highlights leak points under a UV light. After application and system operation, technicians or DIYers inspect suspected areas with a black light to quickly spot dye traces.

• Contains visible U/V dye for fast leak location
• Works in evaporators, condensers, hoses, gaskets, and seals
• Requires a UV light inspection after circulation
• Safe to use with standard detection procedures

Will this product clog my A/C components or recovery machines?

TSI Supercool 39241B is formulated without polymers, reducing the risk of residue build-up inside compressors, expansion valves, or recovery/reclamation devices. The absence of polymeric fillers keeps the system clean while providing a targeted seal for small leaks.

• No polymers to harden or gum up passages
• Compatible with common recovery and recycling equipment
• Safe for use with typical automotive A/C components
• Designed for minimal system interference

How do I apply the 1-ounce can and adapter correctly?

The retail kit includes an adapter that connects the aerosol to the vehicle’s low-side service port for direct introduction into the A/C circuit. Follow safety steps: depressurize if necessary, attach the adapter securely, run the system per instructions, and then inspect for dye using UV illumination.

• Attach adapter to the low-side service port
• Introduce the full 1-ounce can per instructions
• Run the A/C to circulate product through the system
• Inspect with a UV lamp to locate leaking areas

What kinds of leaks can it stop, and what are the limits?

This treatment is engineered for small leaks—hairline cracks, tiny gasket weeps, and slow-seeping hose or seal flaws. It is not intended for large ruptures, failed hoses, or major compressor damage; such issues require mechanical repair or component replacement.

• Effective on slow, small leaks in typical A/C locations
• Not a substitute for replacing visibly damaged parts
• Best used as a diagnostic and preventive single-vehicle treatment
• Ideal for older systems or situational repair where small leaks are present

Who is this for: TSI Supercool 39241B is aimed at automotive technicians, mobile mechanics, and informed DIYers who need a quick, single-can solution to locate and seal small refrigerant leaks without introducing polymers into the system. It fits customers looking for an HFC-free aerosol option that pairs detection (U/V dye) with a non-clogging sealant for routine maintenance, troubleshooting, or minor leak mitigation.