Red stuff on PCB / re-soldering

Discussion in 'General Electronics Chat' started by terror_storm, Jan 18, 2013.

  1. terror_storm

    Thread Starter New Member

    Nov 28, 2010
    I've got a circuit board that is known to have bad solder joints and I would like to reheat some joints and try to coax some life from it. However, half of the board is covered in a red substance.

    A) Most likely, what is the red stuff?

    B) Should I remove it before attempting the soldering?

    C) How (can?) it be removed?



  2. timescope


    Dec 14, 2011
    It is called a Conformal coating and it used to protect the circuit board from the effects of moisture, dirt, chemicals etc. It is usually used when the circuit is to be installed in a harsh environment like a car engine compartment or in a generator. You can solder through it and use a de-soldering pump to remove the solder. Apply some varnish to cover exposed joints when finished.