What is Water Activated Tape? A Complete Guide for Sourcing & RetailBy Gummed Paper Tape / June 25, 2025 Table of Contents What is Water Activated Tape? How Water Activated Tape Works Key Benefits of Water Activated Tape WAT vs. Other Packaging Tapes Industry Applications How to Use Water Activated Tape Frequently Asked Questions (FAQs) What is Water Activated Tape? Water Activated Tape (WAT), also known as gummed tape, is a fiber-reinforced or non-reinforced paper tape that becomes sticky when moistened. It is a premium sealing solution known for its superior strength and security. The core components of WAT are its backing material and the dry, water-activated adhesive applied to it. The most common backing is virgin kraft paper, prized for its durability and natural aesthetic. For heavy-duty applications, the tape is reinforced with fiberglass strands embedded within the paper layers. These strands are typically spaced about 1mm–1.5mm apart, providing exceptional tensile strength and allowing the tape to withstand up to 15kg per inch of pulling force. The adhesive is typically a starch-based or synthetic formula that remains inert until activated by water, forming an instant and powerful bond. Figure 1: Water activated-tape construction layers, close-up of fiberglass-reinforced water activated tape, showing its durable kraft paper construction. How Water Activated Tape Works The magic of WAT lies in its simple activation process. The adhesive side of the tape is brushed with water using a specialized dispenser or a wet sponge. This water dissolves the dry adhesive, turning it into a sticky, paste-like substance. When applied to a cardboard box, this activated adhesive is pushed into the pores and fibers of the corrugated material. As the water evaporates, the adhesive cures and creates a physical and chemical bond with the box itself. This process, known as the “paper-to-paper” bond, makes the tape a permanent part of the carton. It’s not just sticking on the box; it’s bonding with the box, resulting in a seal that is far stronger than what is possible with pressure-sensitive adhesive tapes. Key Benefits of Water Activated Tape Water Activated Tape offers a compelling list of advantages that make it a smart choice for modern businesses focused on quality, security, and sustainability. Superior Strength and Durability The fiberglass reinforcement gives WAT incredible tensile strength, preventing boxes from bursting under stress during shipping and handling. The permanent bond also means the seal is less likely to peel at the edges or fail in high-humidity environments. Tamper-Evidence and Brand Security Once applied, WAT cannot be removed without visibly destroying the tape or delaminating the cardboard surface. Any attempt to open the box is immediately obvious, providing a clear visual indicator of tampering and enhancing security for high-value goods. Eco-Friendly and Sustainable WAT is a favorite for companies with green initiatives. It is made from renewable, biodegradable materials like paper and starch-based adhesives. Unlike plastic tapes, which contribute to landfill waste, WAT is fully recyclable with the cardboard box it’s attached to, simplifying the disposal process for end-users and supporting a circular economy. Excellent Printability for Branding The paper surface of WAT is ideal for high-quality custom printing. Businesses can print logos, branding elements, handling instructions, or promotional messages directly onto the tape, transforming a simple box seal into a powerful marketing tool. Water Activated Tape vs. Other Packaging Tapes How does WAT stack up against the competition? The following table provides a clear comparison to help you evaluate your options. Feature Water Activated Tape (WAT) BOPP/Pressure-Sensitive Plastic Tape Water-Based Adhesive Tapes Adhesive Type Water-activated (starch or synthetic) Pressure-sensitive adhesive Pre-applied water-based adhesive Bond Strength Exceptionally high; bonds with carton fibers Medium; adheres to the surface High final strength Tamper Evidence Yes, cannot be removed intact No, can often be removed and reapplied Varies Material & Recyclability Paper; recyclable with corrugated cardboard Plastic (BOPP); not easily recyclable Varies (often paper-based) Branding Potential High; excellent for custom printing Moderate; printing is common but less premium Moderate Best For Heavy shipments, e-commerce, premium brands, secure & eco-conscious shipping Light-duty packaging, general office use, low-cost solutions Applications requiring flexibility and soft bond lines Industry Applications of Water Activated Tape Water Activated Tape is versatile and is used across a wide range of industries where packaging integrity and presentation are paramount. Figure 2: Water Activated Tape Dispenser manual, A specialized dispenser wets and applies water activated tape for a fast, secure seal. E-commerce and Retail For online retailers, the unboxing experience is a critical touchpoint. WAT provides a secure, professional-looking seal that protects goods in transit and reinforces brand quality when the customer opens the box. Food and Beverage Certain types of WAT use adhesives that comply with food contact regulations, making them suitable for sealing cardboard packaging in the food industry. Logistics and Heavy-Duty Shipping The superior strength of fiberglass-reinforced WAT makes it ideal for sealing heavy boxes, palletized loads, and international shipments that endure rough handling and long transit times. Electronics and High-Value Goods The tamper-evident nature of WAT provides essential security for expensive electronics, pharmaceuticals, and other high-value items, giving both shippers and customers peace of mind. How to Use Water Activated Tape Applying WAT is straightforward, but it does require specific tools for efficiency, especially in high-volume settings. Gather Your Tools: You will need the tape itself and a water-activated tape dispenser. These dispensers hold a reservoir of water and have a built-in applicator brush or sponge. Activate the Adhesive: The dispenser automatically wets the adhesive side of the tape as it is pulled through the machine. For manual application, you can use a wet sponge or cloth to evenly moisten the adhesive. Apply to the Carton: Press the activated tape firmly onto the sealed flaps of the cardboard box. Apply pressure along the entire length of the tape to ensure a good bond. Curing: The bond reaches its full strength once the water has fully evaporated and the adhesive has cured. This happens quickly, often within seconds under pressure. Storage Tip: To prevent premature activation, store rolls of WAT in a cool, dry place away from moisture. Frequently Asked Questions (FAQs) Is water activated tape more expensive than regular packing tape? While the initial cost per roll may be higher, WAT can be more cost-effective in the long run. You often use less tape per box due to its superior strength, and it can reduce losses from damaged goods. The branding and professional presentation can also add significant value that outweighs the cost difference. Can water activated tape be used for international shipping? Yes, it is an excellent choice for international shipping. Its high strength and resistance to temperature changes and humidity make it reliable for long-haul journeys. Furthermore, its paper-based composition avoids the plastic restrictions that some countries are beginning to implement. Is water activated tape truly waterproof? While the kraft paper and adhesive are highly water-resistant once cured, no paper-based product is entirely waterproof. For boxes that will be exposed to heavy rain or standing water, additional protective measures like plastic stretch wrap or a box liner are recommended. However, WAT performs significantly better in damp conditions than many plastic tapes. What is the main difference between reinforced and non-reinforced WAT? The key difference is strength. Reinforced WAT contains embedded fiberglass threads, making it extremely resistant to tearing and pulling, ideal for heavy boxes. Non-reinforced WAT is a single layer of kraft paper and is suitable for lighter-duty applications where a strong, permanent bond is still desired without the need for extreme tensile strength. Can I recycle a box sealed with water activated tape? Yes, this is a major advantage. Because the tape is made of paper, the entire sealed box can typically be placed directly into your standard cardboard recycling stream. The tape will be processed along with the box, unlike plastic tape, which can contaminate the recycling process. Always check with your local recycling guidelines to be certain. Conclusion Water Activated Tape is far more than just a tool to seal a box; it is a strategic packaging choice that delivers unparalleled strength, enhanced security, and a clear commitment to sustainability. For sourcing managers, it offers a reliable way to reduce shipping damage. For retailers and brand buyers, it provides a premium unboxing experience and a powerful branding canvas. And for designers, it aligns with modern eco-friendly values without compromising on performance. By understanding its properties and benefits, your business can leverage this powerful packaging solution to protect your products, elevate your brand, and contribute to a greener supply chain.
