I think it to be the older style roof material and is being phased out with the TPO type. My roof is EPDM.... it was in very poor condition when i bought the rig two seasons ago. I scrubbed it....fixed the tears with the Eternabond tape, sealed with Dicor Lap Seal....and coated with Liquid Roof. The result was more than I imagined. I now have washed the roof twice and used my left over coating to get spots that looked like they were thinly applied. I have travel confidence that the roof will last several more years to the point that I went ahead and put the solar project together and mounted panels over that membrane. Liquid Rubber is some awesome product.
1994 Fleetwood 33H
1995 Fleetwood 30H (parts vehicle)