Window seal strips are designed to fill the gaps around windows, creating a barrier that blocks air leakage. Over time, wear and tear can lead to cracks and small openings in the window frame, resulting in drafts that can significantly affect your home's temperature. This is particularly problematic during the winter months when cold air seeps in, forcing heating systems to work harder, which can lead to increased energy bills. Conversely, during the summer, cool air can escape, reducing the effectiveness of air conditioning units.