Thermal Glue

Discussion in 'General Electronics Chat' started by R!f@@, May 1, 2010.

  1. R!f@@

    Thread Starter AAC Fanatic!

    Apr 2, 2009
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    Hi guys.
    Very recently I have bought high power LED's from china. As these led's requires heat sink to be mounted, most of them have holes.
    But the 1W ones are too small to be screwed but it too gets a little hot so it too needs a tiny heat sink.
    What is the best type of glue that I could use, for transferring heat as well as a strong bond between the Led and heat sink
    Thanks
     
  2. rjenkins

    AAC Fanatic!

    Nov 6, 2005
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    I use RS Components own brand 'thermally conductive adhesive', 850-984.

    This is a two part type, paste plus solvent activator (ie. apply one to each surface).

    It's an acrylic base adhesive & the other acrylics I have used have been classed as Structural, so I'd guess it is also a high strength one.
     
  3. jpanhalt

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    Jan 18, 2008
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    Loctite sells a variety of adhesives with good thermal conduction properties. I don't have a current catalog, but have used Loctite #383 and a repairable, weaker #384. If electrical conductivity is not a problem, I suspect a metal filled epoxy (like J-B Weld) might work well and be a lot cheaper.

    There are undoubtedly other manufacturers out there. Those are just the two I have used where I needed adhesion and heat transfer.

    John
     
  4. Bernard

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    If they are clamped rather than glued, might be easier to remove in case of failure at some future time.
     
  5. Wendy

    Moderator

    Mar 24, 2008
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    Here is how I did my 1W LED back when. The white stuff is thermal grease.

    [​IMG]

    The red LED and diodes is a 1 W LED simulator, the circuit in the schematics below were for a pair of flashing lights.

    I used 2 #6/32 screws, and drilled and tapped a old CPU (286) heatsink.
     
  6. bertus

    Administrator

    Apr 5, 2008
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    Hello,

    Can you show us a datasheet of the power leds?
    That might give a better idea on how to mount or glue them.

    Bertus
     
  7. R!f@@

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  8. Audioguru

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    Dec 20, 2007
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    1) You bought no-name-brand cheap LEDs.
    2) They do not have a detailed datasheet.
    Too bad.
     
  9. R!f@@

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    Who else are making these.
    I haven't seen data sheets for leds.
    Are their any legit company that makes high power led's
     
  10. bertus

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    Last edited: May 2, 2010
  11. R!f@@

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    Heeeeeeeeeeeeeeeeeeeey!.
    Anybody...nobody.
    No one has used glue. surely you must have...
    c'mon
     
  12. Markd77

    Senior Member

    Sep 7, 2009
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    I used bolts too with a thermal pad in between led and heatsink. It works fine on the unmounted ones like you have. You just have to find tiny bolts and it's probably best to use 3 so there is no chance of slippage.
     
  13. mcgyvr

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    Oct 15, 2009
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    Try masterbond for thermal conductive adhesives.
     
  14. R!f@@

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    master bond.......hmmmm.
    where's google?
     
  15. jpanhalt

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    Jan 18, 2008
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    I have used "glue" and gave you the part numbers plus another suggestion. Did you read that post?

    Although a distinction can be made between "glue" and "adhesive," they are close enough.

    John
     
  16. R!f@@

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    oh! my bad :D

    but where can I get it
     
  17. retched

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    Dec 5, 2009
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    Riffa are you going to change you name to Reefer?

    You have no idea how to find a product supplier on the intro-net ?

    Put the pipe down. ;)

    If you need help getting something, PM me. (glue, not reefer)
     
  18. R!f@@

    Thread Starter AAC Fanatic!

    Apr 2, 2009
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    intro net? what the heck is that. :confused:
    I did search but nothing solid came up and about master bond, I emailed to them what I need.
    I do most of buying at ebay as the easiest and efficient way to pay is paypal for me, I cannot get to legit companies. So these kinda things are really hard u know. :(
    What can you get me? retched.

    And about name changing.. mod's doesn't like that. as i still have no reply about that.
     
  19. retched

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    Dec 5, 2009
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    I was just joking with the name changing.

    JB-Weld and Loctite products are all over the place here.

    IF you go to loctite website and find a product that meets or exceeds your requirements, let me know.

    I can also send you a tube of JB Weld. You can put cars together with that stuff. ;)
     
  20. R!f@@

    Thread Starter AAC Fanatic!

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    will this site do
    will you be able to get anything in that site, if it is not too much trouble, I would appreciate ur help.
     
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