The M-D Premium Silicone Rubber Window Seal 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 Premium Silicone Rubber this seal exhibits very high resistance to extreme temperatures and remains flexible when below freezing. It also provides maximum resistance to wear and tear. The self-adhesive design is easy to install by simply pressing onto a clean and dry surface. No hardware required. Before installation, cut to desired length using scissors.