Permanent vs Removable Adhesive

This may be a basic question but I still have some confusion...

Lets use for example cheap oracal 3621 (removable) and Oracal 3640 (permanent)

Both use water based adhesives.

Both say they last 4 years...and from what I have read the only difference is that you can cleanly remove the "removable" for a few years before it becomes "permanent" Something to do with how much force it sticks with...

what about solvent vs water based adhesives? What about proprietary adhesives such as comply or RS adhesive?

I read somewhere that water based adhesives, even if they are permanent, are prone to water infiltration and shorter lives.

What does it all mean?! Or just don't worry about it because they all stay on long enough...I've yet to see an adhesive fail before the vinyl does...

 

either nobody knows or its such a stupid question it doesn't deserve a response.

There's nothing to say, one's removable one's permanent duh!

/bump

 

Now that's pretty cool!