I carry haemo-static crystals in the back-country first aid kit because they stop bleeding fast. For general travel, the risk is not high enough to bother carrying these things. I haven't used wound seal myself, though I have that in my home first aid kit. I also have liquid bandaids. My concern with using a wound sealer is that the wound should be properly cleaned before sealing - so that means carrying a bunch of other stuff. If I need a wound sealer (ie more than a bandaid) then I'm off to a clinic.