Reassembly of the Thermal Sensor

I've been reading the guides for replacing the left and right thermal sensors as well as the guide for replacing the heat sink.

Anyways, I notice that in the last steps of removing the left and right thermal senors, the guides say to,

• Peel back the orange Kapton tape covering the left/right thermal sensor.
• Use a spudger to pry the left thermal sensor off the heat sink/lower case.

So, when I reassemble my laptop, what do I use to reattach the sensors to the heat sink/lower case.

When the term "pry" is uses, it seems as if there's some kind of glue holding it on. If this is the case, what kind of glue is it and where can I get it?