Self-Adhesive Felt Tape - 1.5 in. x 48 ft. roll - Greenhouse Felt Tape - ea 1 by Growers Solution Felt Tape is easy to use in a roll of 1.5 inches by 48 feet long and 1/8" thick. This greenhouse Felt Tape is designed to provide a barrier between the greenhouse frame and film. Guardian Felt Tape has been proven to last and perform. Felt Tape will prevent the tape from degrading as film does not rub against the steel. A 100% UV stable white "upper" felt that withstands mold and rot degradation.