Colormetrics Black Putty Tape / Butyl Tape 1/8" x 3/4" x 30' (2-Pack)
1/8" x 3/4" x 30' Black putty / butyl tape.Commonly used behind the flange on windows and doors.  Excellent sealing properties.  Adheres to many products including metal and glass.  Non-hardening material allows it to conform and stick to the items being sealed.