The Sealand "Odorsafe" hose is actually from an Aussie company, its real
product name is AVS96. There may be other companies distributing this
hose in the states since I believe they've started to manufacture it
here.
I used a small piece of it when I first rerouted my sanitation system a
few years back. It was the section from the holding tank to the y-valve
so it was constantly bathed in black water. No detectable permeation in
three years. I've now replace nearly all my sanitation runs with the
AVS96 product.
I purchased some a few months ago from Fisheries Supply in Seattle and
it's the same product I've used from Sealand. It's harder to work with
than the Trident hose but well worth the work and investment.
No interest in the product other than a satisfied customer.