An UltraCool® product.UltraCool™: SX-SC320 Silver Static Cling 15% window film (75% Heat rejection) sets the industry standard as one of the most powerful and economical solar heat rejecting static cling films available, while maintaining minimal light reduction and maximum glare and heat rejection. A window film with fantastic solar performance specifications which also blocks out 99% of the UV rays! It is also a reflective silver privacy one way film that provides excellent one way visibility and daytime privacy. It can be installed onto glass, Acrylic or poly-carbonate sheeting.