I have re-sealed several GM products with good success.  NAPA sells an OE
grade seam sealer.  It is grey color, so you would probably want to use
masking tape near each side of the seam when applying.  Then paint over
after it is dry.

-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of
JordanVw@AOL.COM
Sent: Saturday, December 06, 2014 6:41 PM
To: vanagon@GERRY.VANAGON.COM
Subject: Re: Seam leaks

In a message dated 12/6/2014 6:40:04 P.M. Eastern Standard Time,
a.richar@GMAIL.COM writes:

I've  found a water/rain leak in a seam on my van.  Cracked OEM  sealant
letting in water but don't see any signs of rust. I just want to  reseal the
seam with minimal painting or rework.  Is this possible or  should I be
ready to grind, sand, seal, prime, AND  paint?

if you dont have any rust, just reseal it.