3M Water Contact Indicators: 5558 Series, Square, 3/32 in Wd, 3/32 in Lg

3M 5558 Water Contact Indicator Tape Squares provide a simple visual confirmation of moisture contact. They change from white to red upon water exposure, making them ideal for quality assurance, leak detection, and environmental monitoring in electronics, packaging, and industrial applications.

The 3M 5558 series squares measure 3/32 in by 3/32 in, are 6 mil thick, and feature an acrylic indicator on a polyester film backing. They are white with a red indicator that changes color upon water exposure. The manufacturer part number is 5558.

3G Electric supplies 3M 5558 Water Contact Indicator Tape Squares worldwide. As a global industrial solutions provider, we handle full logistics and customs clearance to deliver these indicators to your facility. Contact us for pricing and lead time.

Apply the 3M 5558 square to a clean, dry surface where moisture detection is needed. Upon water exposure, the white indicator turns red permanently, providing a clear visual alert. For best results, avoid pre-exposure to humidity and store in a sealed container until use.