External is a sealant for external use on refrigeration and air conditioning system components.
Specifically designed to effectively seal all types of leaks up to 5 mm on metal and rubber components in refrigeration systems, External is resistant to refrigerant oils, agents, and chemical additives.
It is indeed resistant to temperature changes and can be applied to both the low and high pressure sides (cold and hot).

Pressure resistance depends on the size of the leak:

• 5 mm = 40 bar
• 2 mm = 50 bar
• 1 mm = 57 bar