LF Paste No. 3 is a mixture of fine-grained powder with S-Sn97Cu3 (L-SnCu3) binder according to DIN EN 29453 standard and flux according to DIN EN 29454-1 3.1.1.C (F-SW 21). It is used in combination with soft solder No. 3 for soldering copper pipes and fittings in hot and cold potable water installations, as well as in central heating systems with operating temperatures up to 110ºC. It is certified by PZH, DVGW, and RAL. The paste is supplied with a brush.