C'mon Tommy. What are you sealing, how wide are the gaps or applications, how many linear feet, are you looking to duplicate the factory wad or do it nicely, do you want a particulat colour or texture- and on and on. There's lots of choices. Personally, I used Pro-Form #214 and 224. I'm covering every seam on the old sow and I'm about 4-5 tubes in so far and it's nearly done.