Just for copper by Kalimex can be used to bond copper pipes together using regular end feed fittings without needing any heat or a blowtorch to make the joint, you simply clean the copper tube using 60 grit abrasive paper, then apply the just for copper and make the joint as shown in this video. Although I would not use this in a normal situation it is very useful in some situations where a blow torch cannot be used. Full instructions can be found here http://www.justforcopper.co.uk/techni...