Direct Inject for Systems 2.0-10 Tons

Nu-Calgon® 4050-08 EasySeal® Direct Inject Refrigerant Leak Sealant – Technical Product Information

The Nu-Calgon® EasySeal® Direct Inject 4050-08 is a next-generation refrigerant leak sealant designed for professional HVACR applications. Engineered for fast, direct injection into operating systems without the need for pump-down or recovery, this sealant provides a permanent internal seal for micro-leaks in coils, line sets, and other system components. The advanced formulation is compatible with all refrigerants and lubricants, including POE, PVE, mineral, and alkylbenzene oils. Its low-volume, concentrated formula ensures full sealing performance with minimal material usage, supporting efficient system restoration and reduced downtime in the field.

Technical Specifications

• Manufacturer: Nu-Calgon®
• Product Name: EasySeal® Direct Inject
• Model Number: 4050-08
• Application Type: Direct-inject refrigerant leak sealant
• System Compatibility: Works with all refrigerants (HFC, HCFC, and HFO blends) and oils (POE, PVE, mineral, alkylbenzene)
• System Capacity Range: 2.0 to 10.0 tons (split systems, packaged units, mini-splits, and heat pumps)
• Chemical Composition:
  • Triethoxy(Vinyl) Silane
  • Ethanol
  • Toluene
• Physical Form: Liquid
• Appearance: Slight green tint
• Odor: Alcohol to toluene characteristic
• Flash Point: 100°F (38°C)
• Flammability Rating: 2 (moderate flammability)
• Injection Method: Pre-charged direct-injection cartridge
• Installation: No pump-down or recovery required; compatible with standard low-side service ports
• Performance Range: Seals micro-leaks in evaporators, condensers, line sets, and brazed joints
• System Safety: Formulated not to obstruct capillary tubes, TXVs, or metering devices
• Operating Pressure Range: Compatible with standard R-410A and R-22 pressure levels
• Operating Temperature Range: Effective under standard HVAC system operating conditions
• Packaging: Single-use cartridge with quick-connect fitting
• Storage Conditions: Store in cool, dry location; avoid direct sunlight and open flame
• Shelf Life: 24 months (unopened)
• Compliance: Conforms to professional HVAC service standards

Design and Performance Features

• Direct-injection design eliminates the need for pump-down or system evacuation
• Formulated for universal refrigerant and oil compatibility
• Seals micro-leaks without clogging expansion valves or capillary tubes
• Concentrated chemistry ensures full sealing performance with minimal charge impact
• Compact cartridge design facilitates easy field installation
• Ideal for split systems, mini-splits, packaged units, and microchannel coils
• Permanent seal withstands system pressures and vibration
• Maintains system efficiency while extending equipment service life

Professional Summary

The Nu-Calgon® 4050-08 EasySeal® Direct Inject Refrigerant Leak Sealant provides HVAC professionals with an efficient, field-ready solution for sealing refrigerant micro-leaks without system pump-down or recovery. Engineered with Triethoxy(Vinyl) Silane-based chemistry, the formulation integrates with all refrigerant types and oils, offering compatibility across legacy and modern systems. The direct-injection method simplifies service procedures and ensures uniform material distribution throughout the system. Designed for 2–10 ton capacity equipment, EasySeal® Direct Inject delivers a durable, non-clogging internal seal ideal for use in coils, tubing, and joints, supporting reliable system restoration and extended operational uptime.