3M Vetbond Tissue Adhesive
If it's good enough for horses and golden retrievers, it's good enough for me! Just kidding. Despite its name, 3M Vetbond Tissue Adhesive is a first aid option intended for humans who have cut themselves to "minor wound" status and want to seal it up quick and tight, without bloodying a whole box of bandages.
The Tissue Adhesive comes in a 3ml squeeze bottle with reusable, removable tips. The 3M action in Vetbond's solution polymerizes in seconds, and is tinted with a (presumably nontoxic) blue dye so it's easy to see during application.
Oh, and even though the Vetbond Tissue Adhesive is made for you of 2 legs, it does appear to be safe for use on your 4-legged friends as well.