EXTREME ULTRA is a leak stop that repairs refrigerant gas leaks that can occur in vehicle A/C systems, residential, commercial, and industrial air conditioning and refrigeration systems. It works on both rubber and metal components, permanently sealing leaks up to 0.3 mm. It can be used to prevent micro-leaks too. Extreme Ultra is compatible with all refrigeration lubricants and refrigerant gases, including R12, R134a, R1234yf, CFC, HFC, HCFC, R410a, R32 and HFO, except ammonia (R717). It can also be used with A/C systems of hybrid or electric vehicles. Thanks to its polymer-free formulation, Extreme Ultra is safe for the system: it does not react with moisture and oxygen and does not damage or block the AC/R systems. Visible when exposed to any UV lamp. 6 mL is the universal dose for all vehicles (hybrid and electric included) and air conditioning or refrigeration systems up to 21 kW (or 700 mL of compressor lubricant). Find out more on errecom.com.