Resolite CR (FS25A) Opaque is a resistant sheet of reinforced polymer with fiberglass (FRP) of great resistance and with flame classification UL 25. Resolite CR resistant sheet was especially developed for roofs and walls of the high specification industry. Available in Series 30 (30% fiberglass) and Series 40 (40% fiberglass) and great variety of models, from 840 (8 oz/ft 2 nominal) up to 1440 (of 14 oz/ft nominal square). Series 30 has a C/W barrier which is an available option both for exterior surfaces as for interior. The C/W barrier is a high range solution to improve weathering resistance of the FRP sheets and is superior to high volatile coatings applied by sprinkling, that erode and disappear in a short time.