What is ASIG: “ASIG” or Autocatalytic Silver Immersion Gold, is a final finish for pcb’s that is supplied by DOW. It was released to the market in 2010, and TRAX started experimenting with it in 2012. The finish consists of SILVERON™ MF 100 Electroless Silver which is an innovative autocatalytic silver material. The autocatalytic nature of the product provides a dense silver coating which is non-porous and prevents the formation of copper oxide on the surface of the silver.