Fill cracks with this single-use can of expanding foam insulation. It hardens enough to be cut in one hour and reaches full strength in 24 hours.

This two-part expanding foam insulation meets ASTM standards for flame and smoke and covers large areas.

Seal small openings in fire-resistant walls and floors.

Hand-mold this putty to fill small openings in fire-resistant walls and floors.

Good for sealing large openings in fire-resistant walls and floors. Mix this lightweight powder with water to create a thick paste that's easy to apply.

Slide these into the small gaps around pipes passing through fire-resistant walls and floors.

No need to drill mounting holes, this weatherstripping has a peel-and-stick adhesive backing.

The magnetic insert provides a tight seal on metal doors.

Keep noise, dust, and drafts out of your space. The large, dense seal on this weatherstripping muffles sounds that would otherwise travel through gaps in your door frame.

Also known as door sweeps, this weatherstripping closes the gap between the bottom of the door and the floor.

In addition to mounting to the door's face, this weatherstripping fits into cutouts (mortises) to mount flush with the door.

Avoid scuffing your floor and reduce wear on your seals—this weatherstripping has a plunger that lowers the seal as the door is closed and raises it as the door is opened.

Mount this weatherstripping to the sides and top of an overhead door frame to close gaps.

After installation, the seal projection can be adjusted with a screwdriver to ensure a tight fit.