*Refrigerant.
FreonŽ is a brand name from DuPont for what is inside cans and drums = refrigerant, notably; dichlorodifluoromethane and chlorodifluoromethane (12 and 22).
*Solder is low heat with silver based materials.
Brazing is higher heat with copper based materials (mixed with silver)
I suggest aero uses soldering so he don't burn his house down, or melt copper pipes into ingots while attempting to braze.
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