Here some info regarding the material of the boats-
Zodiac® Strongan (often generically referred to as "PVC")
(also Bombard, Metzeler from 1989 on, Serié 1, Sevylor); ZED, Quicksilver;
West Marine (blue); WestMarine by Zodiac, other copolymer or PVC coated fabric
Hypalon or Hypalon/Neoprene Fabric
(Avon, Achilles, Boat/US, Sea Rogue, West (red or grey boats),
Metzeler before 1989, some older Zodiacs. Most non-Zodiac fabrics
fall into this category.
Also, my MAYA S came with a "1986 boat line catalogue from Metzeler", so I am assuming that my boat is 1986. This means that it is made of Neoprene - (maybe Hypalon according to the above statement from http://www.westportmarina.com/zodiac...s/repairs.html
Check out http://www.inlandmarine.us/testimonials/
for some ideas on materials to help restore your Metzeler. I have no personal experience with this company or these materials, however, I plan on sealing my Metzeler using this material or something similar that is available in Canada (Edmonton). Just stay away from Krazy glue (although superglue claims to work, I think).