External is a ready-to-use putty leak stop that seals refrigerant gas leaks up to 5 mm on rubber and metal components of air conditioning and refrigeration systems, including those of vehicles.
Quick and easy application for a quick and permanent repair: it can be easily mixed by using two fingers and once applied, it permanently repairs the leak in 4-5 hours. Once dried, it can be easily sanded or removed.

Benefits:

• There is no risk of product dispersion in AC/R systems.
• Ideal for urgent repairs on systems that cannot be stopped (refrigerating rooms, medicine storage facilities, server, and data center air conditioning systems, etc.)
• Perfectly adheres to metal (copper, aluminum, and steel) and rubber components
• Resists refrigeration lubricants (Mineral, POE, PAG, PAO and Alkylbenzene)
• Resists refrigerant gases (CFC, HFC, HCFC, CO2, R32 and R1234yf)
• Resists additives and flushing fluids, including chlorinated ones
• Temperature range use: -100-270°C (-148-518°F)
• Can be used on either the high or low pressure side