M-D Building Products 43100 Window Film, Clear Product Description The M-D Building Products' Shrink and Seal Indoor Window Kit is installed around entire window to eliminate cold air drafts and frost build-up. Crystal clear film that is easy to install with a hair dryer that shrinks tight and wrinkle-free. Creates dead air space to increase insulating R-Value up to 90-Percent. From the Manufacturer The M-D Building Products' Shrink and Seal Indoor Window Kit is installed around entire window to eliminate cold air drafts and frost build-up. Crystal clear film that is easy to install with a hair dryer that shrinks tight and wrinkle-free. Creates dead air space to increase insulating R-Value up to 90-Percent. Features Eliminate cold air drafts and frost build-up Increase insulating R-Value up to 90-Percent Easy to install using a conventional hair dryer Shrinks tight and wrinkle-free Clear finish USA SHIPPING estimates delivery times and we work to get your item to you as quickly as possible and within those times, but please know it may take slightly longer than the estimate.