Thermal tape or thermal glue? I find tape holds fine as long as you don't touch the heatsinks too often (and that the heatsinks are small). Glue is permanent for all intents and purposes and should be used only if necessary really (or you are dead certain about your project).
I had good results with the adhesive from Arctic Silver and have used it in several projects. I have seem guides on DIY adhesives (super glue and regular thermal compound) but never tried it. Making your own could possibly be the best solution since you can use chosen components and control the mix (not to mention a cheaper alternative).
I have seen some industrial grade adhesives being sold on Amazon. Forgot the name. Still, 3M adhesives are top notch, so I doubt you would find that much better options.
Samsung EVO 850
Windows 10 Pro
CM Storm QuickFire TK
▲ hide details ▲