LASCO 11-1033 PTFE Pipe Sealant Tape, 1/2-Inch x 100-Inch, White. Teflon pipe sealant tape. 1/2-inch x 100-inch. White color. Meets Federal Military Spec # T-27730A. On plastic spool. LASCO, Lasco Supply Company Inc, The Preferred Brand! Service, Selection, and Support! Larsen Supply Company is 3rd Generation, Family owned and operated for over 80 years. LASCO packaging includes helpful how to instructions and related project item information. LASCO has the largest retail plumbing line in the industry today with over 7000 packaged and 16,000 bulk SKU’s. Visit our online web site catalog for one of the most complete product listing in the industry.