Specifications︰ AIM Web site AIM solder preforms are specialty solder shapes used in the electronics industry for manufacturing and repair of circuit boards. AIM solder preforms are made with the same Electropure™ high purity solder and alloys that is used in the manufacturing of AIM solder paste, cored wire and bar solder. A variety of shapes and sizes are available with or without flux coating. AIM preforms can be manufactured in specialty alloys, standard tin/lead alloys, and our patented lead-free alloy,