I've heard of people suggesting superglue for wound closure in the past and wanted to write something up regarding the topic. I think it stems from use in the Vietnam war. Modern superglue contains a substance called ethyl-2-cyanoacrylate. It produces a short chain polymer when dry. This short chain polymer is not flexible and tends to become toxic and brittle before the wound is healed. In Vietnam they used a substance called N-butyl-cyanoacrylate which was sprayed onto wounds to last until surgery was performed. There was some success with this but the idea never caught on in the USA except in veterinary medicine. This polymer was slightly longer and provided more flexibility. Today there is an FDA approved substance called Dermabond that is used in hospitals in place of superficial sutures. This chemical is 2-octylcyanoacrylate and is significantly longer (molecularly) and about 4x's stronger than the one from Vietnam. It is to be placed on the skin only and works best for straight, clean wounds such as those created with a scalpel. I would not recommend this for field use, especially on deep wounds as it will not have the tensile strength to hold multiple tissue layers closed. I personally use modern superglue for one thing, paper cuts! As long as it is not deep enough to cause bleeding a little superglue will relieve the pain and protect it from the pain caused by bending the finger and getting it wet.