How much heat can hea DCF take? Or, what kind of adhesive sticks to it?

The face fabric on your pack is polyester, right? How about using some Seamgrip? I believe that is compatible with polyester.

Hey cool. I knew there had to be a fairly simple solution. It’s a Zpacks pack, it’s black and crispy like a lot of their black things. It’s not thin like the green things they make.

It’s woven fabric on the outside, yes? Then it’s got fabric laminated to the outside. I think it’s 50D polyester but I’m not an expert. They used to have a materials information page where they describe the fabrics. If this all checks out then go hit the McNett website and verify that SeamGrip sticks to polyester.

I’m pretty sure you mean straight up DCF by green stuff. It’s translucent and has Dyneema fiber on the interior bonded to Mylar faces. It’s smooth and translucent.

Good luck!

Also maybe just put the patch on a hat or leave it at home? I do the latter with patches and stickers because I don’t like making decisions or commitment. YMMV

I found a good place for my patch. I sewed up a shoulder pocket for my phone. Nothing I had was big enough to fit my phone properly so I did it myself. I sewed the patch on the shoulder pocket. Problem solved.

I’m a minute too late. I was just about to suggest sewing it through the DCF hybrid, then seam taping over the threads with DCF tape. That will work.

Tried a heat gun (more oomph than a hair dryer) when Cuben first came out.  The mylar melts long before igniting, and just the initial melting makes it unusable, destroying an expensive tent or tarp.  But there have been some posts recently that suggest that just hot sun can deform DCF enough to cause wrinkles in a canopy that do not come out; but I’ve no experience with that because do not use DCF.  It is not a relevant concern with nylon, because nylon cannot be exposed anyway for a long time to sun without deteriorating, slowly but surely, even though the 6,6 (‘mountain’) nylon is used for hot air balloons.  And woven polyester, which also has good bias stretch, needs a higher and heavier denier to achieve the same strength as nylon.  Hope DCF tent/tarp users can provide better info about resistance to heat from the sun for those who have experience using their shelters in the daytime when it is not cloudy or raining; in layovers in campgrounds, for example..