Has anyone seam sealed an HMG Expedition

I corresponded with HMG about this subject some time ago and got this answer from Mike:

"We do seam seal every where we can during the manufacturing of our packs. The only place we cannot is the seam around the back panel of the pack. If you would like to seam seal the pack around this seam I would recommend using a liquid seam sealer like the McNett Seam Sealer and run a small bead around that seam on the outside of the pack. I've never found the need to do this on my personal packs but we have had several customers do this with great success."

/J

I've never bothered to, and haven't had a problem.

I sealed a portion of the back panel, not because I was worried about waterproofing, but because the seams appeared to be under a lot of tension in that area (between shoulder straps and upper compression straps (see below). I used seam grip, and it has held up well, with no evidence of widening of the stitching holes.

Just reviving this old thread to check if anybody else had tried seam sealing the bottom seam of their HMG pack.  I tried seam sealing the outside seam (as recommended by Mike Pierre) but found this to be not very effective as one side of the seam joins the hip belt and so has a foam/ mesh surface.

I am about to turn the whole pack inside out and will seal from the inside but just thought I’d check if anybody has any tips on doing this?

As an aside – am I alone in thinking it’s a bit disappointing that HMG doesn’t work out a way to do this properly in the factory?  Seems odd for a pack that is touted as ideal for pack rafting?