Instruction: Given a question and the related document, and generate the answer to the question based on the information provided in the document.

Input:
Question: How do I separate parts attached with this?  I have a failed peltier cooler attached to a heatsink that needs to go back to the manufacturer.
Document: I purchased this thermal adhesive to permanently attach a few heatsinks to a graphics card. The stick on adhesive on the heatsinks was garbage, so I scraped it off and prepped the surface on the heatsink and the ICs. After mixing the epoxy in even parts, I applied a thin layer to the IC and gently applied the heatsink. After all of the heatsinks were applied, I used a heat gun to help the epoxy set. Once it sets, the epoxy is very solid.
The specs state this adhesive works down to -40C. I followed the instructions to the letter to bond a thermo electric cooler to a copper heatsink. The heatsink is kept at 0C and the cold side of the TEC at roughly -20C. Under these conditions the bonding strength is so weak that I had no trouble removing the TEC from the heatsink. While this stuff might work fine at higher temperatures it does not perform well at all at low temperatures.
I have a video card cooler that originally came with tape adhesive for the voltage regulator heatsinks and they did not even stay attached for a year before falling off. Then I used Arctic Alumina thermal adhesive and it was just the ticket for the job. The order came quickly and the product was easy to use. I would recommend it to others that want to permanently attach heatsinks and not bother to use thermal adhesive tape.
The product failed to hold to the plastic of the vram, but held just fine to the aluminum heatsink, and I had to use a dremal to remove it so I could re-use the heatsinks. When I initially put the heatsinks on, I prepped the surfaces using lint free cloths and arctic silver's own overpriced prep solution, and used it within about a minute of mixing (i did 2 batches so each 4 heatsinks would have "fresh" compound) so I doubt the issue was prep.
I used this to glue a copper plate to a thermo electric cooler and then some copper pipe to the copper plate. Nasty smelling. I would not want to eat this.
I used this product to (try to) hold ram heatsinks onto a ati 5850 that had a fan fail, requiring the replacement of the cooler. It seemed to hold for about a year (I don't know for sure I wasn't checking) and then 2 heatsinks fell out of the card when I pulled the card out to do some work on the case.
The product seems to be working well so far. I glued some GPU heatsinks for an aftermarket cooler on my GTX 580 and they seem to be holding well (they are hanging upside down by the adhesive. )Tip: Make sure you mix the product thoroughly or the bond won't be very strong. I noticed a strong chemical smell after I mixed the products for a while so I think this is a signal that the product is ready to be used.
I was having problems with a router that was overheating and giving me problems. I got a hold of a good heatsink and used the adhesive to mount it. Haven't had a problem since.
I used this stuff on a custom design, where I had chip hardware where I needed to glue the heatsink to the processor. It worked well.Just remember - this is an adhesive and not a paste or grease.
This thermal adhesive was used for an LED project where I glued the LED's to an aluminum heatsink for better heat dissipation. When finished, I bought several more tubes, because I am finding more uses.
Answer: It is difficult to remove cured thermal compound, but it can be done. Use 91% or higher rubbing/isopropyl alcohol to soften it up, and pry from the edges slowly with a non-metal tool.You may want to try twisting the cooler a bit too, that can soften it up and it may pop off when given enough torque. Once removed use the alcohol and lots of paper towels to clean things up.