Boss 33316, 333 Foam Polyurethane Expanding Foam, 12 Ounce Aerosol

Key Features:

• A ready to use, multi-purpose, polyurethane foam that expands to three times its original volume upon contact with air.
  
• Use for insulating around pipes, cables and blank openings, gaps and cracks.
• Weather Proofs against wind and moisture.
• Can be cut, sanded and painted.