body sealer before primer, or the other way 'round?

[Ranchero50]

Got the 3m brush on sealer for the body seams, also have the high build primer to smooth the body. Neither say anything about the other. Which goes on first?

Jamie

[fordman]

just guessing. i would say the sealer on the seams first.

[67 ford f100s rule]

i agree with fordman.

[Steve302]

Hello,
The 3M seam sealer will do fine over metal or any well prepped surface.
You need to give that stuff several days worth of dry time before you load up your high build primer. Even then, you will most likely get some crazing in the primer that was applied over the seam sealer and it will show up in the paint too, but seam sealer is usually in places where its not that noticeable.
Steve

[layedout72]

Primer absorbs water, so you want the sealer first. When done with primer and body work its smart to use an epoxy primer as it will seal the truck completely. The epoxy does not absorb water.