The M-D PLATINUM Expandable Foam Weatherseal protects against drafts, moisture, dust and insects. Perfect for uneven and oddly-shaped gaps, the expandable foam slowly expands to fill the gap as needed. Save on energy by sealing the home and keeping the heat or air conditioning from escaping. When 80% compressed the product provides a watertight seal. Simply peel the liner and stick to the desired surface. Before installation, cut to desired length by using scissors. *