The single biggest problem with an air mattress is that, sometimes, the air just won’t stay in! Holes are all too common, but a quick fix.
Identify and mark the problem hole
Use a small brush to apply the Seam Grip
Peel the backing off the gear repair tape
Be sure to cover well past the end of the hole
Finding the leak can often be the hardest part. Pouring soapy water or immersing the mat in the bath should create bubbles, indicating where the air is escaping.
Thoroughly dry the mat and clean it with isopropyl alcohol. A small dab of Seam Grip or a similar adhesive over the hole (extending at least 5mm from the hole), should do the trick. Allow it to dry overnight
When out in the field, gear repair tape can be used as a temporary fix until the hole can be glued.
Tip: you can use the same adhesive technique on leaky sleeping mat valves.
Seam Grip: $19.95