Heatsink glue...

C3P0

Does anyone know where I might get some heatsink glue, need to re-affix a heatsink to a chip on a power supply, and the glue is the only thing holding them together, no clamps holding the heatsink down. The chip is a power IC, in the primary power supply section of the power board of a sat receiver.

Looking for a bricks and mortar shop I might be able to go to tomorrow, preferably west or south Dublin. Radionics only seem to have compound, not glue. Just wondering if there are any shops worth going to, that they won't look at me as if I'm speaking out of my ass.

danjo

I got some, a few years ago, in PC World in Carrickmines. Look in the area where they display PC components, PSU's etc.
Maybe give them a ring before going there to make sure they still stock it.

watty

Maplin. It's x10 the proper price, but likely to have it.
2x Dublin, Dundalk, Cork, Limerick, Galway and Belfast.

Liameter

I put a tiny blob of compound at the centre, then a drop of superglue at each corner. Press firmly for ten seconds.

danjo

Liameter wrote: »

I put a tiny blob of compound at the centre, then a drop of superglue at each corner. Press firmly for ten seconds.

I would not rely on a "tiny blob" of compound to dissipate the heat. The size of the heat sink surface area would be one of the design parameters. By greatly reducing the surface contact area you would be taking a risk.
Perhaps it will work in some instances as Liameter suggests but be wary.

Liameter

The actual silicon chip is unlikely to be greater than 5mm in diameter so this is the contact area required. The heatsink compound is only required to fill the interstices (imperfections in the surfaces), which will be no more than a few microns deep. The tiniest amount of silicone compound will spread out under pressure and be quite adequate.

STB

Clean off the old stuff with isopropyl or you will undo the "glueing"

Any computer repair shop will have thermopaste.