ERRECOM Extreme Ultra is a highly effective leak stop solution designed for air conditioning and refrigeration systems. It permanently seals micro leaks up to 0.3 mm in metal and rubber components without reacting to moisture or oxygen, ensuring long-lasting system protection. Formulated for use with all refrigerant gases, including R134a and R1234yf, Extreme Ultra is compatible with all types of oils and does not clog the system or recovery units. Its ultra-concentrated formula means only a small dose is needed, making it perfect for modern, compact A/C systems in automotive and industrial applications.