Mastercool 53660 — Master Leak Shield HVAC (1.5 to 6 Tons)

Professional HVAC leak sealant with UV dye for larger systems from 1.5 to 6 tons. 3 oz can of Master Leak Shield HVAC sealant with dye lubricates system, seals small leaks, and illuminates larger leaks through the use of high-quality universal fluorescent dye. Compatible with all refrigerants and oils. No need to recover refrigerant during application. Made in USA, Intertek laboratory tested.

Key Features

• Lubricates System: Helps prevent leaks through proper lubrication
• Seals Small Leaks: Automatically seals minor leaks in system
• Illuminates Larger Leaks: High-quality universal fluorescent UV dye
• Compatible with All Refrigerants and Oils: Universal application
• No Refrigerant Recovery Required: Apply without evacuating system
• Stops Leaks in Metal and Rubber: Works on evaporators, O-rings, gaskets, hoses
• Patented Delivery System: Prevents residual sealant in can
• Made in USA: American quality and manufacturing
• Intertek Laboratory Tested: No damage, no restriction verified

Technical Specifications

• Model: 53660
• Type: HVAC leak sealant with UV dye
• System Size: 1.5 to 6 tons
• Can Size: 3 oz
• Compatible Refrigerants: All refrigerants
• Compatible Oils: All oils
• Contains: Universal fluorescent UV dye
• Testing: Intertek laboratory certified
• Country of Origin: USA
• Weight: 0.2 kg
• SKU: 53660
• HS Code: 84189910

Also Available

• 53615-A — Master Leak Shield HVAC (Up to 1.5 Tons) - 1 oz can for smaller systems

Applications

• Commercial HVAC systems (1.5 to 6 tons)
• Residential A/C systems (1.5 to 6 tons)
• Heat pump systems
• Refrigeration systems
• Evaporator leak sealing
• O-ring and gasket leak prevention
• Hose leak sealing
• System lubrication and maintenance

How It Works

Master Leak Shield HVAC combines three functions in one product:

1. Lubrication: Circulates through system providing lubrication to prevent future leaks
2. Leak Sealing: Automatically seals small leaks in metal and rubber components
3. Leak Detection: UV dye illuminates larger leaks that require repair

Benefits

• Prevents Future Leaks: System lubrication reduces wear and tear
• Seals Existing Small Leaks: Automatic sealing of minor leaks
• Identifies Larger Leaks: UV dye shows leaks requiring repair
• No System Evacuation: Apply without recovering refrigerant
• Universal Compatibility: Works with all refrigerants and oils
• Safe for System: Intertek tested - no damage, no restriction
• Complete Can Evacuation: Patented delivery system uses all sealant
• Made in USA: Quality American manufacturing
• Professional Quality: Laboratory tested and certified

Perfect For

• HVAC contractors and installers
• Commercial A/C technicians
• Residential A/C service
• Heat pump service
• Refrigeration technicians
• Preventive maintenance programmes
• Systems 1.5 to 6 tons capacity

What It Seals

Master Leak Shield HVAC stops leaks in:

• Evaporators: Seals small evaporator coil leaks
• O-Rings: Conditions and seals O-ring connections
• Gaskets: Seals gasket leaks in system
• Hoses: Seals minor hose leaks
• Metal Components: Seals small metal leaks
• Rubber Components: Seals rubber component leaks

How to Use

1. Ensure system is running
2. Connect Master Leak Shield can to low-side service port
3. Open valve and allow sealant to be drawn into system
4. Patented delivery system ensures complete evacuation of can
5. Allow system to run for 30-60 minutes to circulate sealant
6. Small leaks will seal automatically
7. Use UV light to inspect for larger leaks (UV dye will illuminate)
8. Repair any larger leaks identified by UV dye

Choosing the Right Size

• Up to 1.5 Tons: Use 53615-A (1 oz can)
• 1.5 to 6 Tons: Use 53660 (3 oz can) - This Product

Using the correct size ensures proper concentration of sealant and UV dye for optimal performance.

Intertek Laboratory Testing

Master Leak Shield HVAC has been independently tested by Intertek laboratories and certified for:

• No System Damage: Safe for all system components
• No Flow Restriction: Does not clog or restrict system
• Refrigerant Compatibility: Works with all refrigerants
• Oil Compatibility: Compatible with all oils

Patented Delivery System

The patented delivery system ensures:

• Complete evacuation of sealant from can
• No residual sealant left behind
• Maximum value from every can
• Consistent dosing for system size

Safety Guidelines

• Use in well-ventilated areas
• Wear safety glasses when connecting to system
• Follow proper refrigerant handling procedures
• Do not exceed recommended dosage for system size
• Use UV safety glasses when inspecting with UV light
• Store in cool, dry location

Maintenance

• One application typically lasts the life of the system
• Reapply if system is evacuated and recharged
• Use UV light periodically to check for new leaks
• Combine with regular preventive maintenance

Professional Quality: Mastercool leak sealants are built to professional standards for reliable leak prevention and detection in HVAC/R service environments. The 53660 Master Leak Shield HVAC (3 oz) provides comprehensive leak sealing, system lubrication, and UV leak detection for systems 1.5 to 6 tons. Made in USA, Intertek laboratory tested for safety and performance.