3M Indoor Window Film Mounting Tape, 1/2 in. x 500 in. is a reliable double-stick tape designed specifically for use with 3M outdoor window insulating kits. This tape an easy and effective way to apply window film to interior window frames and moldings, ensuring a secure and airtight seal. Its easy-to-apply design allows for a hassle- installation process, creating a strong bond between the surface tape and the film for a long-lasting seal that helps insulate your windows from outdoor elements. Made for indoor use, this tape provides durability and resistance to various weather conditions. The ready-to-peel liner makes application quick and efficient, making it a convenient choice for your window insulation needs. Model Number: 2145C