thats what i would do. i think im going to paint mine. im not sure yet , it depends all on how it turns out .. haha
u can get seamsealer at a parts house or paint store just make sure it is 3m because it is eaiser to shape and cleans up with adhesive cleaner.
yep what layd87 said...just go to any automotive paint supply store that sells 3m products and they will put you on the right stuff. If you are doing a roll in bedliner and all your seams are welded up completely using a seamsealer may not be necessary.