What is this white goo?

Discussion in 'General Electronics Chat' started by jonhamil, Oct 9, 2011.

  1. jonhamil

    Thread Starter New Member

    Oct 9, 2011
    7
    0
    Hi

    Apologies if this is a stupid question - I am refurbishing a circuit board and have found several components are protected from vibration with a white sealant / glue (see example on photo). I have scraped most of it off, but some remains.

    Can anyone advise me exactly what it is called? Even better would be an RS / Farnell P/N?

    Many thanks in advance,

    Jon
     
  2. ErnieM

    AAC Fanatic!

    Apr 24, 2011
    7,386
    1,605
    Seeing the board itself before you pulled the part would make a positive ID easier.

    It's probably just some silicon caulk. Best purchased from a Home Depot or Lowes.
     
  3. t06afre

    AAC Fanatic!

    May 11, 2009
    5,939
    1,222
    I would have used a glue gun after doing the rework.
     
  4. jonhamil

    Thread Starter New Member

    Oct 9, 2011
    7
    0
    Thanks - there is some more of this stuff elsewhere (see picture).

    I am sure it is more scientific than ordinary caulk. Digikey must do something like this just not sure what it's exact description is.

    Any more ideas?

    Many thanks in advance,

    Jon
     
  5. Evil Lurker

    Member

    Aug 25, 2011
    117
    23
    Im pretty sure is caulk too. Cheapest stuff the manufacturer could get off Hongkong's Itnofryapalt Rongtime LTD company shelves.
     
  6. debe

    Well-Known Member

    Sep 21, 2010
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    184
    If you are going to use Silicone caulk make sure its Neutral cure, as some are corosive. Hot glue is probably cheaper & safer (non corosive)
     
  7. KJ6EAD

    Senior Member

    Apr 30, 2011
    1,425
    363
    Home store silicones emit acetic acid (acetoxy cure) when they cure which can be damaging to some electronics materials, especially copper and brass. Non corosive silicone adhesives for electronics emit alcohol (alkoxy cure) when they cure and are safe even in sealed enclosures.

    http://www.mgchemicals.com/downloads/appguide/appguide0205-1.pdf
     
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