This is an update to this post.

I turned the backpack inside out to see the damage on the inside. Most of the black plastic coating was gone, and you can see the patch I applied in the outside.

I decided to coat pretty much the entire bottom with Shoe Goo sealant, like I did in my last repair. This gave the material a lot of extra stiffness, as well as waterproofing it. You can see it applied in the shinier areas:

Here is the sealant on the inside of the biggest rip, holding the patch in place:

I know this update isn’t particularly visually impressive, but it felt like a pretty successful fix. I’m looking forward to being able to use this bag again!

    • PhlogistonOP
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      1 year ago

      It’s not sticky at all, the best comparison I can think of is dried Elmer’s glue. Feels like a smooth plastic coating, stiff when it’s in a thick layer, but pretty flexible when applied thinly