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sledcaddie
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JAN 25, 09:00 PM
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[QUOTE]Originally posted by theogre:
Most Heatsink Grease does dry out but still works after doing that.
The "oil" is just carrier to move the compound to install. "Oil" can be silicone oil or whatever liquid to make the stuff.
That said...
I don't use HS grease anymore.
Use green label Permatex Brake Grease.
Will allow metal to metal hitting and fills tiny gaps to transfer heat. Plus unlike HS grease never dries or runs when hot.
So, Ogre, does Permatex make a HS paste? If so, what is the difference with its green label brake grease?
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Skybax
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JAN 25, 11:40 PM
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theogre
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JAN 26, 12:51 AM
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PBG Green label has been around for Decades.
More recent also have a ceramic brake grease w/ a lt blue label. Claims even bigger temp range to operate but never tried it.
Isn't a HS Grease/compound and Permatex doesn't make a HSG but most should have it doing brake work.
Will flow much thinner because is not a HSG allowing metal touching and fill small gaps too.
HSG is to fill small gaps and mostly stay put years or decades later. Most normal and syn grease will work but still runs cold, hot or both and makes a mess and not plastic safe too. IOW Many things will work same or Better then "standard" White HSG (Silicone oil w/ Zinc Oxide) including Hyped High $ HSG used by PC people to remove heat...
White HSG was made 70+ years because most normal grease had same or worse problems and still made because very cheap and does a good job.
PBG is plastic safe and doesn't run or even get thin.
I have use White HSG and Many others for PCs and other electronics but ran out one day years ago and have PBG from brake jobs so used that and many time since never bother w/ HSG again. Example: I use it for current PC and AMD 8 core CPU pegged @ 4.3mhz never goes above ~150°F w/ "just" Hyper 212 and One slow fan. Most times runs ~ 70°F all day long.
GPU w/ whatever installed by ASUS runs > 100°F even @ idle w/ 2 fans spinning faster.
Even when Hyper 212 moves because how it's mounted... PBG doesn't care unlike most HSG will need re-greasing as has dried out and now "breaks" the joint even moving Fractions of a mm.
Knocking a heatsink or fansink around is easy just trying to clean dust inside of vast majority of PC and other cases.[This message has been edited by theogre (edited 01-26-2022).]
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theogre
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JAN 26, 01:11 AM
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Is standard White HSG. For the amount and package type is a rip off.
PBG can use it on brake parts, as HSG, and more.
Like Can use it to keep out "water" from wire joints like ends bolted/screwed to engine and frame because plastic safe and won't wash off easy.
silicon oil/grease and most dielectric greases (which are silicon grease) are ok but not as good. Many things included ICM came w/ dielectric greases as HSG but no longer to cut cost for them.
I get small bottles of PBG and last for years because you often use very small amounts even for brake jobs.[This message has been edited by theogre (edited 01-26-2022).]
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Patrick
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JAN 26, 01:34 AM
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| quote | Originally posted by theogre:
I use green label Permatex Brake Grease.
Will allow metal to metal hitting and fills tiny gaps to transfer heat. Plus unlike HS grease never dries or runs when hot.
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Ogre, is Permatex Brake Grease much different than Sil-Glyde (which has always been highly recommended for brake use).
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theogre
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JAN 26, 02:37 AM
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| quote | Originally posted by Patrick:
Ogre, is Permatex Brake Grease much different than Sil-Glyde (which has always been highly recommended for brake use).
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Yes
Sil-Glyde may contain Silicon oil or solids but has Castor oil "30-60%" by publish MSDS/SDS.
PBG green is >90% SYNTHETIC BASE OILS (TRADE SECRET) by same source.
Castor oil like most organic oils (like corn and other cooking oils) can go "rancid" or otherwise degrade often over a short term.
Even in dark cool places degrades just from O2 let alone from Ground Level Ozone in cars.
Plus Sil-Glyde MSDS say...
Harmful to aquatic life. Harmful to aquatic life with long lasting effects.
but says Clean Water Act and others rules/laws may not apply. ???
Sil-Glyde https://agscompany.com/wp-c...FINAL_09_07_2018.pdf
PBG Green https://staging.worldpac.co...ake_Caliper_Lube.pdf
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sledcaddie
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JAN 26, 10:11 AM
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Who knew there was so much to learn about heat sink grease? Thanks, Ogre! I will try the Permatex green.
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Patrick
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JAN 26, 04:56 PM
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| quote | Originally posted by theogre:
Sil-Glyde may contain Silicon oil or solids but has Castor oil "30-60%" by publish MSDS/SDS.
PBG green is >90% SYNTHETIC BASE OILS (TRADE SECRET) by same source.
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Ogre, thanks for the info.
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pmbrunelle
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JAN 26, 07:21 PM
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I was using Thermalloy 250G (yellow tube) heat sink grease under a 2.8 ICM.
It worked, but it needed to be wiped clean and reapplied as part of an annual tuneup.
When I tried to stretch the maintenance interval, problems arose around 2 years. After 2 years, I had the ignition cutting out, and I found water trapped underneath the ICM (no more close contact between ICM and distributor base).
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Patrick
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JAN 26, 08:02 PM
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| quote | Originally posted by pmbrunelle:
I found water trapped underneath the ICM (no more close contact between ICM and distributor base).
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How'd it get in there? 
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