Do not buy the refrigerant kit at Canadian tire or Parts man, it is not the correct refrigerant for the car. it is a mix blend that operates close to the 134A. and it has a high concentration of Propane wich is also know as a refrigerant due to the fact the it goes from a liquid to a vapor state.
Not safe. better to get the proper refrigerant by a qualified mechanic, and if you are low, then you must have a leak, and the leak will need to be repaired, then put on a Vacuum, then recharge.
And it is not legal to do any of the above unless you have a Ref lic and ODP cert.
Do it right or don't bother doing it at all.
