Thank You for your responses!! Unable to locate manufacturer by internet or phone, all lines of communication have failed. It's like they have dissappeared. The pinhole is actually on the bottom of the bladder right at the seam. It appears that during the welding process the machine was stopped and realigned then the process was continued. This created about a one sixteenth of an inch offset from one part of the seam to the other. The pinhole is right at this offset. If I were to use a patch I would prefer to do this on the inside, which is impractical. One other suggestion I had was to use a small syringe to shoot aquaseal into the bladder through the pinhole and actually create liquid patch from the inside using air pressure to help secure the patch. I am pretty sure the bladder is made of thick clear vinyl.