Industrial "putty" needed to stick wires to heatsink

Hello,
We need some “putty” (like Blu Tak but able to be stuck onto a hot LED heatsink) to stick our LED wiring to the earthed heatsink. Do you know of any?

We have a 150W LED light, and the wires that connect to the 8 LED COBs unfortunately often end up getting crushed underneath the enclosure (which is also the optic) when it is screwed down…. and we then end up with shorts to earth due to wire strands popping out of the crushed wire’s insulation and connecting to the earthed heatsink.
We need to stick the wires down to the heatsink so they cannot move and get trapped under the enclosure when it is screwed down. Do you know of suitable sticky stuff that’s quick to use? (ie not hot melt glue)

You don't say anything about temperature which is KIND of an important parameter. How about using some kind of wire clip? They come with double sided tape or screw mount.

Thanks, we need cheap and quick to use and putty is seems to answer this call.
We cant make mountings for clips as all the heatsinks in there 1000's have been manufactured for us.
Temperature the heatsink goes to say 70degC to 80degC max.

treez said:

We need some “putty” (like Blu Tak but able to be stuck onto a hot LED heatsink) to stick our LED wiring to the earthed heatsink. Do you know of any?

Click to expand...

No, I do not know of any putty but any wire insulation will stand more than 100C. So you can use any epoxy based glue or putty for this purpose. They stick well to Al.

And you are right: hot melt glue is NOT a solution because they are thermoplastic whereas epoxy is thermoset.

Permatex® High-Temp Red RTV Silicone Gasket Maker is not a putty but is very viscus
and would hold small wires in place. It skins over in 10 minutes.
Temperature range -65ºF to 650ºF (-54°C to 343°C)
https://www.permatex.com/products/g...s/permatex-high-temp-red-rtv-silicone-gasket/

DNA Robotics said:

Permatex® High-Temp Red RTV Silicone Gasket Maker is not a putty but is very viscus and would hold small wires in place. It skins over in 10 minutes.

Click to expand...

Silicones appear very appealing but many formulations release acid (acetic acid, mostly) over extended periods. Acetic acid smells like stale sweat (vinegar) and if you can smell it after a few days, then I do not suggest it for electronics use.

By the way, some silicones (during and after setting) smells like perfume- that is just a mask for the stale smell. Look for a label that claims "for electronics use"- that may come at a premium.

Hello treez,
The only thing that I know of that may suit your needs, is a heat sink compound that a company
here in Australia sells. The company is called WES Components.
You can locate the product HERE
When the page has loaded, go to the, "Electronics Components" option on the left hand column.
Click the "Greater Than" symbol to the right, and go through each page until you get to Page 10-35.
When you reach that page, have a look at an item heading: HEAT TRANSFER COMPOUND THAT SETS HARD
The stuff is called, "Platinum Thermal Grease".
This compound sets hard, is not silicone based, but once set, its extremely difficult to remove the item stuck to
it.
I apologize for the poor picture quality, but if you inquire with the company, they may be able to give you
specifications to which may be desirable for your needs.
A word of warning though, this stuff is not cheap.
I hope the above helps.
Regards,
Relayer