of less than about 30 by weight of the precursor layer while it is contemplated that various polymer elastomer adducts may be employed according to the present invention one preferred adduct is an epoxy elastomer adduct the precursor layer may thus include an elastomer containing adduct the epoxy elastomer hybrid or adduct may be included in an amount of up to about 80 by weight of the precursor layer the elastomer containing adduct may be approximately at least 5 more typically at least 7 and even more typically at least 10 by weight of the precursor layer the adduct may be up to 60 or more but more preferably is about 10 to 30 by weight of the precursor layer of course the elastomer containing adduct may be a combination of two or more particular adducts and the adducts may be solid adducts or liquid adducts at a temperature of 23 u00b0 c or may also be combinations thereof the adduct may be composed of substantially entirely i e at least 70 80 90 or more of one or more adducts that are solid at a temperature of 23 u00b0 c the adduct itself generally includes about 1 8 to 3 1 parts of epoxy or other polymer to elastomer and more preferably about 1 5 to 1 6 parts of epoxy to elastomer more typically the adduct includes at least about 5 more typically at least about 12 and even more typically at least about 18 elastorner and also typically includes not greater than about 50 even more typically no greater than about 40 and still more typically no.