It is a vinyl backing. I used it for my rimless tank and will never paint again. It is manufactured by Avery and sold by the roll. It is quite expensive if you buy it this way. I bought mine from
www.jaws.net
It is distributed by the foot by a company called OceanVisions. It is hard to find.
http://search.store.yahoo.com/cgi-bi...&SUBMIT=Search