No have not called them, I thought they were out of business .The reason I was asking I was going to try the liquid roof, but it says not to use on a alpha brand roof.
Have you tried the Coachmen web site or called them directly.
The maintenance on rubber roofs is pretty standard regardless of manufacturer clean and inspect four times a year. Clean with a mild detergent, DO NOT use cleaners containing citrus or petroleum distillates. Inspect joints and apply self levelling lap joint sealant as required.