3M 5557 Ulta-Thin Water Contact Indicator Tape

3M™ Ultra-Thin Water Contact Indicator Tape 5558 is an ultra-thin, 6.0 mil (152 micron) thick tape used to indicate water contact. The tape permanently changes from white to red upon direct water contact. Tape may be die cut using rotary die cutting process. Substrate should be smooth, clean, dry and oil-free to ensure good wet-out and adequate adhesion. Adhesive should not be applied at temperatures < 10°C (50°F) [best if room temperature or higher]. Temperature resistance is -40°C to 65°C for days or weeks and up to 121°C for minutes or hours. 

Applications: Use as a water contact indicator in handheld or portable electronic devices such as smart phones, tablets and phablets, laptop computers and keyboards, wearable electronic devices, gaming and MP3 players, two-way radios and cordless phones, digital and video cameras, Li-MH batteries and chargers. The ultra thin caliper, 6.0 mils total, is suitable for applications with tight design tolerances.