Originally Posted by prairie tuber
This is not accurate. Dupont developed and trademarked hypalon (chlorosulfonated polyethylene) which is basically a coating for fabrics. They do not themselves produce and sell the hypalon coated fabric that are used on inflatable boats.
Additionally fabric thickness is not the sole determinant of quality for either hypalon or PVC fabrics.
If this is so, why on the dupont haypalon application profile mentions their product to last longer on inflatable boats: "Fabrics with an attractive coating of Hypalon® are weather- and water-resistant, rugged ... yet are lightweight and easy to handle. All these qualities make it perfect for use on inflatable boats". Pennel, Orca hypalon is it's competitor, perhaps more used than Dupont beceuase of better priced, who knows.
It's not determinant, but helps a lot for any boat to last longer being better protected against nicks, abrassions, etc than thinner same materials Good hand made, perfect gluing and thicker fabric materials will determine for a better long lasting product.