Azdel?

So I'm looking at the Heartland website and notice they are advertising laminated Azdel sidewalls. How long have they been using Azdel? Did I overlook that feature on my 2018, or is it something new?

Check out this recent thread. I might be offer some information.

I did a search and found the thread, which is what I should have done in the first place.. Good for Heartland. Wish I had it.