seam sealer

I'm gettin ready to do the sheetmetal work in the bed and was wandering about seam sealer. I have a couple of ?'s. It is applied before primer correct? Is there a brand out there that i could put on the backside and the front of the sheetmetal bed floor and then sand the top jus like a body filler? Also whats the best stuff to use?

when i bodydropped my bed i used a product by 3M it was in a tube you use in a caulk gun,i primed mine first with a red odide primer on super clean metal..worked awesome!

i find the tub is easier to work with. you can get a tub of 3m seam sealer for 25 bucks.

you most always have to prime it first, self etch or 2 part epoxy, scuff the primer then apply the seam sealer, but follow manuf. directions.... I like to use the stuff that comes in a sausage tube, but you have to buy the gun for it, i just like it because its no mess. an easy way to smooth it out is run u a bead, take a 1" brush and cut the bristles pretty short like 1/4" to 1/2" brush the seamseal to a somewhat smooth appearance, then get a mild solvent like a slow urethane reducer, wax and grease remover or ive even used that 3m general purpose adhesive remover works well just pricey. take that squirt it on the seamseal generously and smooth it out the way you want it with the brush or your finger if your brave! some seamseals are sandable or u can let it dry prime over it with a surfacer and sand it smooth. no they dont sand like filler and yes you can use it on both sides. hope that helps

heavy body seam sealer works pretty good, but if you using the kind in the 3m gun, it dries in 15 min.... and is paintable.