thermal paste discoloration?

CTho9305

Elite Member
Jul 26, 2000
9,214
1
81
I've had some of the radio shack stuff on my slotA tbird for a while (few months or so), and I just removed the heatsink today to replace it with a p7125

The radio shack stuff apparently switches from grease to adhesive after a while, or there was a really tight vaccuum. It was pretty hard to pull off. anyway, after it was off I noticed that near the center area (where the core is, through the heat plate) the paste had a slight orange-ish tint. is that normal? After wiping off most of the paste from the heat plate, there was a thin layer of gray stuff that only came off with liquid. Is that normal?

thx
 

nam ng

Banned
Oct 9, 1999
532
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It's perfectly normal for HS compound to change color after it's been in use, some do some don't dependent on how it was made.
 

CTho9305

Elite Member
Jul 26, 2000
9,214
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good to hear. still, i should prolly see if I can get some arctic silver cheap somewhere...
 

Shmorq

Diamond Member
Aug 10, 2000
3,431
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<< arctic silver cheap somewhere... >>

Check out here. It's for $8 including free shipping, but I believe they only accept paypal. Also, everhthingconnected.com is listed under Arctic Silver's authorized dealers and distributors.
 

jamarno

Golden Member
Jul 4, 2000
1,035
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Thermal paste is a mixture of oil and powders, and silicone oil is slightly orange or yellow. The grey may be aluminum oxide.

Don't worry. I have Radio Shack and Dow Corning thermal paste 25 years old that's still fine, in one case in a stereo amplifier with transistors that operate at about 80C.