In reply to bonduman:
I've recently re-glued the seams on a Gortex drysuit using stormsure seam sealer diluted with their thinners. Struggling to link to it directly but search their website (www.stormsure.com/video) for the video titled "Drysuit Seam Sealing Repair with Stormsure + Thinner". Their seam sealer is similar to seamgrip, but the thinners allows you to dilute it to the consistency of water so you can paint it on with a brush.