ALPHA SLS 65 is an active, low solids, no-clean flux. It is formulated with a proprietary mixture of organic activators. Several proprietary additives are formulated into SLS 65, which act to reduce the surface tension between the solder resist and the solder, thereby dramatically reducing the tendency of solder ball generation. The formulation of SLS 65 is also designed to be more thermally stable, thereby reducing the occurrence of solder bridging