The AP Products Window Seal for Frameless Windows is specially engineered with stronger adhesion. This low-density foam tape has adhesive backing on 2 sides.• Engineered specifically for frameless windows• Stronger adhesion for top performance• High-density foam for airtight and watertight seal• Easy to install with adhesive backing• 3/8" x 5/8"• 25' total length High-density foam for airtight & watertight seal Adhesive backing on two sides 3/8"" x 5/8"" x 25' long | AP Products Window Seal for Frameless Windows, 3/8" x 5/8" x 25', Black