Is Automotive AC Leak Sealant Effective?

[McJayla]

Automotive AC leak sealants are not effective. Here are the relevant details: 1. Important Notes: For any vapor-compression refrigeration system piping, there is no such thing as a "leak sealant." Since the refrigerant in vapor-compression refrigeration system piping is in motion with constantly changing pressure and temperature values, conventional leak sealants fundamentally cannot provide an effective seal. When refrigerant leaks occur in vapor-compression refrigeration systems, brazing repairs are required - products like "leak sealants" or "stop-leak additives" should never be used. 2. Potential Hazards: After leak sealants fail, they leave behind only some colloidal residue adhering to the AC piping. If this residue is promptly removed, it won't cause negative effects. However, if leak sealants are introduced into the refrigeration system piping, they may cause certain damage to the piping, refrigerant, or compressor oil.