Nu-Calgon 4050-11 EasySeal Direct Inject Refrigerant Leak Sealant with UV Dye 1.5 - 5 Ton Systems

The Nu-Calgon 4050-11 EasySeal Direct Inject is the ultimate chemical "brain" for permanent leak repair in residential and light commercial AC and heat pump systems. Acting as a critical safety monitor for your refrigerant circuit, this professional-grade formula is specifically engineered to find and seal microscopic "pinhole" leaks that are impossible to detect with standard electronic sniffers. Designed for systems ranging from 1.5 to 5 tons, it features an integrated UV leak-seeking dye that serves as a visual diagnostic tool. Unlike old-style sealants, the EasySeal Direct Inject uses a proprietary "Direct Inject" technology that allows it to travel with the oil and refrigerant without clumping or clogging expansion valves (TXVs), ensuring total system harmony while restoring cooling efficiency.

Key Features

• Genuine Part Number 4050-11: Guaranteed OEM-compatible formula that works with all common refrigerants including R-410A, R-22, and R-134a.
• Advanced UV Dye Detection: Features a concentrated leak-seeking dye that glows under UV light, allowing technicians to verify the repair or locate larger mechanical breaches.
• Eliminate Low Charge and Noise Issues: Permanent seal prevents the frequent "hissing" of gas leaks and stops the repeated service calls for refrigerant top-offs.
• Safety Monitoring Technology: Continuously circulates within the system, remaining in a liquid state until it contacts oxygen at a leak site, where it forms a permanent, flexible seal.
• Direct Inject Application: No pump-down or recovery required; the specialized injector allows for a 5-minute application directly into the low-side service port.

Product Details

• Brand: Nu-Calgon
• Manufacturer: Nu-Calgon
• Part Number: 4050-11
• Capacity: Treats systems from 1.5 Ton to 5 Ton
• Compatibility: R-410A, R-22, R-134a, R-404A, R-507
• Application: AC and Heat Pump Systems
• Physical Form: Liquid (Oil-based carrier)
• Safety Rating: Non-clogging to TXVs and Capillary Tubes
• Weight: 0.3 lbs

🛠️ HVAC Depot Pro Tip

Take a Picture First — Before injecting the 4050-11, photograph your manifold gauge readings on the low and high sides. Having a visual record of your system pressures is essential for a post-seal diagnostic check to confirm that the "hunting" behavior of the compressor has stabilized. Ensure the system is running and the compressor is engaged before injection to allow the sealant to circulate immediately. Always use a UV flashlight to inspect the evaporator and condenser coils after 48 hours of operation to confirm the leak has been successfully addressed by the sealant.

Cross-Reference

• Superseded Parts: 4050-08, 4050-05, 4050-10
• Legacy Drawing Numbers: EasySeal-SS, UV-Inject-05
• Equivalent Brands: Clip-Light Super Seal, Spectroline GLO-STICK, Rectorseal Leak-Seek

Model Compatibility

• Central Air Conditioners (Suffixes: 1.5, 2, 2.5, 3, 4, 5 Ton Units)
• Residential Heat Pumps (Suffixes: Standard and High-Efficiency Outdoor Units)
• Ductless Mini-Splits (Suffixes: Multi-Zone and High-Wall Series)
• Package Units (Suffixes: Gas/Electric and Dual Fuel 13-18 SEER)