Wonder Tape

This stretchy, non-sticky, self fusing silicone rubber tape called Tommy Tape is said to form an air- and water-tight bond around an object and can even be wrapped around something underwater. It is designed to take up to + 500 degrees and cold to -85 degrees. Tommy Tape comes in one-inch widths, in lengths of 36, 28, and 21 feet and in varying thickness (Tommy Tape can be manufactured in widths from ¼" to 2" wide, from 5 Mil to 80 Mil thick and up to 110' in length.). They come in a variety of colors and custom colors. Suggested retail price for a 36-foot roll of 20 mil. Thick is $13. Contact Tommy Tape for more info and a list of their 1001 uses. 

Courtesy of Trailer Boats Magazine/September 1994 pg. 43.