3M Water Contact Indicators: 5557 Series, Disc, 1/8 in Dia, 10.2 mil Thick

The 3M 5557 Water Contact Indicator is a 1/8-inch disc that changes from white to red upon moisture exposure. It is used to visually confirm water contact in sealed electronics, filters, or packaging, helping maintenance teams detect leaks or condensation without disassembly.

The 3M 5557 Series disc has a 1/8-inch diameter, 10.2-mil thickness, polyester film backing, and 82 oz/in steel adhesive. Pre-exposure color is white; post-exposure color is red. It provides a permanent visual indication of water contact.

3G Electric supplies the 3M 5557 Water Contact Indicator worldwide. As a global industrial solutions provider, we handle full logistics and customs clearance to deliver these moisture-sensing discs to your facility, ensuring you get the right part for your application.

To install the 3M 5557 disc, clean the surface to remove dust and oil, then peel the liner and press the disc firmly onto a dry, non-porous area. Avoid touching the adhesive. The disc will permanently turn red upon water exposure, so place it where moisture detection is critical.