If you are looking for new ribs for sale you can go direct to the manufacturer and ask to see some boats in the manufacturing stage, then you will be able to see the thicknesses of the various materials used, you can look beneath the outer skin of the boat, and get to know what lies beneath. Repaired boats are worked upon by factory technicians using the same glue and same techniques used for a new inflatable rib for sale, and hence are as good as new ones.