Can this be used as exterior film?

Yes, however this film is not recommended for installation onto single pane plate glass. It is only suitable for tempered, heat strengthened,double insulated glass units or single pane tempered glass. We highly recommend also taking a look at our vinyl opaque black here: https://www.decorativefilm.com/solyx-sxv-9-1003-black-gloss-opaque-48-and-60-wide