Hi Mr Gabbey,
This is the reply I had from Norway....
The fender material is PVC.
Internally we can use some of the material in our own production, the rest is used by a company making roofing.
Used fenders should be delivered to the correct handling facilities. In Norway I believe that most end up being heat energy, (burned and the heat is used for warming of water, again used in heating of houses).
This would of course be different from location to location.
I will now enquire of the Dutch company and get back to you.
Kind regards
Erica
Compass Marine