It's Just Caulk, Right?

Well, not if you're going to do the proper caulk job it's not. You need to understand what type of caulk is used for what purpose. It's not hard to pick the right kind of caulk if you have the proper information (which is why I'm here...).

This tutorial How to Select the Right Caulk for the Job will explain all about latex, silicone and butyl caulks and where to use them. Have a read won't you?

And while you're here, also see:
How to Caulk Like a Pro