Can I go with the store brand for seam sealer, or do I need to go with one of the other brands? It is for floor pans.

Also, anyone have a photo of how much needs to be put on the seam? The stuff is obviously not cheap and I am assuming needs to put on top and bottom of the lap, correct?

This is a daily driver 69 vert (Well, that is "daily" when it wants to run at least!!!)