My choice is DAP Alex Plus siliconized latex caulk. It goes down white but dries clear. It holds well, but is easily taken up with a putty knife. You will need to get a caulking gun to use it. You don't need much, just run a thin bead down the centerline of your track plan and spread it with a putty knife. You can use it for both the cork and the track, but for the cork I would just get the cheapest latex caulk you can find at the store. Save some money that way.
Thanks. I'll look for that. Already have a caulk gun and several putty knifes. My order should be in sometime this week and hopefully I'll have time over the weekend to start putting it all down.