M-D Building Products 42-by-62-Inch Shrink and Seal Window Kit, 3 Windows #04440 From the Manufacturer Shrink 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%. Features Fits Three Standard Size Windows Easy to Install Shrinks Tight Wrinkle Free Prevents cold drafts and heat loss through windowpanes Increases R-Value up to 90% 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.