Great question — answering as the UphillTech team:
Many manufacturers of inflatable sleeping pads sell repair kits. Duct tape could be used in an emergency, but I would only use it as a last resort as it will leave a residue on your sleeping pad when you get back home and want to repair it properly. Most kits will have something like the following items in them: Seam Grip Sealer & Adhesive Tenacious Tape Repair Tape or Tenacious Tape Repair Patches Small patch brush Seam Grip Field Repair Kit If I were to make my own repair kit I would add a few more items to make it a little bit more usable on other things. Pencil or Sharpie to mark where the leak is Rubbing alcohol to clean the spot Cotton swabs to used with rubbing alcohol Small pair of...
Full answer by Ken Graham: https://outdoors.stackexchange.com/a/15435 (CC BY-SA 4.0).
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