Can Mice Chew Through Steel Wool or Expanding Foam?

Steel Wool Deterrent

Steel wool is a reliable rodent deterrent when used in a specific manner. To prevent mice from chewing through steel wool, use a thick layer of 00 or 000 steel wool. This type of steel wool has smaller, more tightly packed wires that mice find difficult to chew through. Typically, mice prefer to chew along the surface of steel wool rather than trying to chew through the dense wires. This makes it an effective deterrent in areas like cabin walls, baseboards, and doorways.

Expanding Foam Sealing

Expanding foam, while convenient, can be a weak link in a mouse-proofing strategy if not properly sealed. To prevent mice from gnawing through expanding foam, ensure the area is completely dry before applying the foam. It’s essential to use a high-quality expanding foam specifically designed for sealing gaps around doors, windows, and other openings. When applying foam, use a caulk gun with a long nozzle to fill gaps up to 1 inch in diameter. After the foam has expanded and dried, use a utility knife to trim any excess foam, leaving a smooth finish.