The M-D Premium Thermoplastic Rubber Window Seal for Medium Gaps is designed to protect against drafts, moisture, dust and insects. Save on energy by sealing windows keeping the heat or air conditioning from escaping. Made of durable Thermoplastic Rubber, this seal exhibits the highest sealing propertites for a window. The seal provides maximum resistance to wear and tear, the highest resistance to wind and water, and exceptional material memory for long-term durability. The self-adhesive design is easy to install by simply pressing on to a clean and dry surface. No hardware required. Before installation, cut to desired length using scissors.