personally ive never liked solar film( too soft & low heat not recommended for gliders.)& havent seen the stuff for sale , at least fresh stuff for 25 years. and there are better materials around . same for orginal super monokote. although IMHO a better product than solar stuff. Ora cover is quite good as wellas ultra cote -which is essentially the same product. it will not melt the foam through the sheeting unless you really go at it with excessive heat. coverrite makes some fine products but they are all a little different.SIG used to market a good covering material as well as BalsaUSA.