Every touch has a standard vhb that we usually install with.
This varies depending on the size and manufacturer.
e.g.:
23.8" 3M we use vhb number: 31130019.
27" Zytronic we use vhb number: 31130053.
The "rule" is that the larger and more sensitive a touch is, the further away it should be from the display. So the thicker the vhb should be.