Why More Companies Are Switching to Water-Activated Tape for Carton Sealing

When it comes to sealing shipping cartons, the tape you choose can have a significant impact on package security, product protection, labor efficiency, and even your brand image.

While acrylic pressure-sensitive tape remains common in many packaging environments, more manufacturers, fulfillment centers, and e-commerce operations are switching to water-activated tape (WAT), also known as gummed paper tape, for its superior strength, tamper evidence, and professional appearance.

In this article, we’ll explore how water-activated tape works, why it outperforms conventional plastic tape in many applications, and what to look for when selecting a water-activated tape dispenser.

What is Water-Activated Tape (WAT)?

Unlike pressure-sensitive acrylic tape, water-activated tape uses a starch-based adhesive that remains dormant until water is applied.

Once moistened, the adhesive becomes activated and forms a strong bond with the corrugated carton surface. Rather than simply sticking to the box, the adhesive penetrates the fibers of the corrugated material and becomes part of the carton itself.

The result is a strong, permanent seal that is difficult to remove without visibly damaging the box.

Water-Activated Tape vs. Acrylic Tape

A simple way to understand the difference:

Acrylic tape sticks to the box. Water-activated tape bonds to the box.

Feature	Water-Activated Tape	Acrylic Tape
Security	Excellent	Fair
Tamper Evidence	Excellent	Poor
Seal Strength	Excellent	Good
Heavy Cartons	Excellent	Fair to Good
Sustainability	Excellent	Limited
Professional Appearance	Excellent	Good

Why Companies Choose Water-Activated Tape

Better Package Security

Because the adhesive bonds directly to the carton fibers, attempts to open the package leave visible evidence of tampering. This makes WAT a popular choice for e-commerce, industrial products, electronics, and other higher-value shipments.

Stronger Carton Seals

Reinforced water-activated tape often allows companies to securely seal cartons with a single strip down the center seam, even on heavier packages.

Improved Sustainability

Paper-based water-activated tape is generally recyclable along with corrugated cartons, reducing reliance on plastic packaging materials.

Enhanced Brand Presentation

Water-activated tape lays flat and creates a clean, professional appearance. Custom printing options can also transform shipping cartons into branded marketing assets.

Why Heated Water Matters

Many companies don’t realize that water temperature plays an important role in seal performance.

Warm water helps activate the starch-based adhesive faster, allowing it to penetrate carton fibers more effectively and create a stronger bond. It also improves performance in colder environments and helps speed up package processing in higher-volume operations.

This is where dispenser design matters.

The Tach-It Advantage

The Tach-It WAT-E and Tach-It WAT-J water-activated tape dispensers include heated water systems as a standard feature, helping deliver reliable tape activation and consistent carton seals.

This is particularly important because many competing dispensers offer heated water only as an optional upgrade.

Choosing the Right Water-Activated Tape Machine

Model	Best For
WAT-M	Lower-volume packaging and general shipping operations
WAT-E	Daily shipping departments, warehouses, and manufacturing facilities
WAT-J	High-volume operations using jumbo tape rolls to minimize roll changes