TapeCase 3M 5559 4MM-DISC-100 White Paper/Acrylic Adhesive Ultra Thin Water Contact Indicator Tape, 0.005" Thickness, 0.157" Length, 0.157" Width (Pack of 100) Used to indicate water contact, rapidly changes from white to red when contacted with water Does not falsely indicate water contact in high humidity environments Top surface is printable by laser and ink jet printing methods Excellent bonding to a wide variety of substrates Industrial grade tape product