TSI Supercool HVAC Leak Stop Syringe with Hose — 2 fl. oz., seals leaks up to 30 mm, treats systems to 6 tons

TSI Supercool 28399 is a 2 fl. oz. (60 mL) syringe with application hose that permanently seals HVAC and refrigeration leaks up to 30 mm without polymers and treats systems up to 6 tons.

This compact leak-stop syringe is designed for quick, technician-friendly repairs in residential and light commercial air conditioning and refrigeration systems. The included reusable application hose reaches service ports and hard-to-access fittings, while the formula is engineered to be compatible with all common refrigerants and lubricants. It also contains corrosion-inhibiting additives to help reduce future deterioration and can reduce compressor noise while extending component life when used as directed.

How does this product stop leaks without harming system components?

The formula avoids polymers and relies on a chemistry that bonds at leak sites without forming harmful deposits inside the system. Because it was developed to be inert with existing oils and refrigerants, it won’t gunk up valves or metering devices. The package also adds corrosion inhibitors to protect metal surfaces after treatment.

• Non-polymer formula to prevent internal buildup
• Compatible with all lubricants and refrigerants
• Includes corrosion-inhibiting additives for long-term protection
• Reduces compressor noise associated with certain leaks

How do I apply the 2 oz. syringe and hose in a service situation?

Connect the reusable application hose to the syringe and attach to the system service port per standard service procedures. Slowly inject the product according to system size and pressure; the 2-ounce volume is intended to treat systems up to 6 tons. Follow safety and system-specific instructions for best results.

• Attach hose to service port for targeted delivery
• Inject gradually while monitoring system pressure
• 2 fl. oz. treats up to a 6-ton unit
• Reusable hose simplifies multiple service calls

What kinds of leaks and systems can this syringe handle?

Designed for HVAC and refrigeration systems, the product is effective on leaks up to 30 mm in size, such as pinholes, small brazed joint leaks, and porous metal. It is not suitable for automotive air conditioning and should not be used in vehicles. Use on larger ruptures or when there is significant refrigerant loss should be paired with mechanical repair.

• Seals leaks 30 mm and smaller (pinholes, small joints)
• For HVAC and refrigeration equipment — not for automotive use
• Intended for in-place repairs; major damage needs part replacement
• Works with most refrigerants and lubricants found in modern systems

Will using this product affect warranty or system performance?

The formula was created to avoid substances that could foul components, and it is compatible with commonly used system oils and refrigerants. Because it does not contain polymers, it minimizes risk of clogging capillary tubes or expansion devices. Always consult equipment manufacturer warranty terms and follow proper service practices before adding chemical treatments.

• Non-polymeric chemistry reduces risk to internal parts
• Compatible with a wide range of refrigerants and lubricants
• Helps reduce compressor noise when addressing certain leaks
• Check manufacturer guidelines for warranty impact

Who is this for? HVAC technicians, facilities maintenance teams, and refrigeration service professionals who need a compact, reliable leak-stopping option for small breaches will benefit from TSI Supercool 28399. It's suited for on-site quick repairs in homes, offices, and light commercial settings where rapid, non-invasive treatments are preferred. For automotive A/C applications or major system failures, choose an appropriate automotive product or mechanical repair instead.