M-D Building Products Foam Window Seal provides an effective air-sealing solution for small gaps around windows and doors. This gray, closed-cell PVC foam tape is weather-tight and self-adhesive, making it easy to install by peeling off the paper backing and pressing into place. Designed for durability, it remains flexible and is backed by a 3-year guarantee. Ideal for improving energy efficiency by blocking drafts, this 17-foot strip is a versatile choice for home maintenance and weatherization projects.