Heng's Industries 5055 RV Trailer Camper Sealants Butyl Rubber Tape 3/16" X 3/4" Black Roof Repair Tape; Use To Seal Lap Joints; For Rubber Roofs; Non-Trimable Butyl Tape; 3/16 Inch Thick x 3/4 Inch Width x 20 Foot Roll; Black Excellent Sealing Properties. Pliable, Tacky And Adheres To Any Type Of Metal, Wood, Concrete, Glass, Plastics And Porous Surfaces Off-White, Non-Hardening Elastic Butyl Based Material. Provides Excellent Sealing Adhesion To Any Type Of Metal, Wood, Concrete, Glass, Plastics, And Porous Surfaces Excellent Sealant For Any Lap Joints. Increases In Adhesion With Age After It Is Applied Ideal For Sealing Roof And Side Panels As Aluminum To Aluminum, Galvanized To Galvanized, Or Aluminum To Galvanized Metal