What is a wet glue label and how does it work?

A wet glue label is a paper label with no pre-applied adhesive; instead, water-activated glue is applied by the labelling machine at the moment of application, bonding the label directly to the container. This is the traditional labelling method most associated with glass bottles.

Unlike a self-adhesive label, a wet glue label has no pressure-sensitive adhesive pre-coated on its back. Wet glue labels can be produced on coated, uncoated, metallised, and other specialty paper stocks. On the packaging line, the labeller applies a controlled layer of wet adhesive to the back of the printed label immediately before it is pressed onto the container, where the adhesive sets to form the bond.

Because there is no liner to remove and no adhesive pre-coating, wet glue labels are usually cheaper per unit than self-adhesive labels at comparable print specifications, but they require dedicated wet-glue labelling equipment on the production line rather than a standard pressure-sensitive applicator. This combination of lower material cost and classic, tactile paper finish is why wet glue remains the preferred format for premium spirits, wine, and beer at high production volumes.