This site is optimized for Chrome, Firefox and Safari. Internet Explorer users, please disable compatibility mode for best viewing experience. ×


Alerts you when change is needed, not in advance.

H.B. Fuller’s Hydralert™ Wetness Indicator Accurately Alerts Customers When Change Is Needed, Not In Advance.


Designed to eliminate costly inventory waste from premature color change, Hydralert™ Wetness Indicator is less susceptible to premature color change when exposed to humidity.

Our new patent pending technology performs even in extreme conditions, offering unsurpassed humidity resistance, fast, distinct color change and better machining properties than standard wetness indicators.

See the video in Chinese

Learn more about our Full-Care™ Adhesive solutions for the nonwovens industry.