The first boat, that was equipped with Ullman Jockey seats, is operated by SSRS, the Swedish Sea Rescue Institution, since 1993. They called a couple of monts ago because the neoprene covers were worn out.
We expect them to last long, but we have to assume that they do not last for ever. When they wear out, the covers can be replaced.
We had some seats with blue upholstery on the Zodiac CZ7. Under the sun of Florida the color bleached already the first season.
Lab test witout salt did not result in bleaching.
It is probably a good idea to rinse out the salt to prevent fading.
Still there is no fabric that will not tend to fade over the years. Black is far better when it comes to not fading.
We also produce cover bags to put over the seats, which we recommend for tropical latitudes and of course offer to all customers who whish to keep the seats from aging.
Remeber the covers people used to put over scooters and MCs way back.