Air mattress dribble - I've hear Acrylic paint or Krylon H2O works but that sounds unconventional... Thoughts? I've found the VERY small hole in the bottom, but it's contained...

I've found the VERY small hole in the bottom, but it's contained by an awkward spot that may not allow for using a bicycle-tire repair kit. This interconnect below said to use acrylic paint or Krylon H2O but that just sounds unusual.

http://www.wikihow.com/Repair-a-Sagging-...

Does anyone know if this works or if it is even safe? I merely use the air mattress when staying at a friends place (not adjectives the time).
Masonry wall repair ? for pros.?
Answers:    there is a product they use for pools i expect its called blue artifice. put that on the hole and that should stop the problem. i mean you can even repair underneath water.