Tape comparison
Kraft tape vs masking tape for shipping
Kraft paper tape (often water-activated) and masking tape look similar - both are paper-backed - but they are built for opposite jobs. Kraft tape is a structural box closure with a permanent bond. Masking tape is a low-tack, removable tape designed for paint lines and short-term holds.
Using masking tape to seal a shipping box is one of the more common DIY mistakes. This guide breaks down the difference and points to the right SKU for each job.
Quick answer
Do not use masking tape to seal shipping boxes. Masking tape is designed to be removable - it lifts off corrugated, fails in heat or humidity, and gives almost no tamper resistance. For box closure, use kraft paper tape (water-activated for the strongest bond) or a standard carton sealing tape.
Side-by-side comparison
| Attribute | Kraft Paper Tape | Masking Tape |
|---|---|---|
| Backing | Kraft paper, often reinforced with fiberglass strands | Thin crepe paper |
| Adhesive | Water-activated starch (WAT) or pressure-sensitive rubber | Low-tack rubber, designed to release cleanly |
| Bond type | Permanent - water-activated bonds into the corrugated fibers | Temporary - peels off with no residue |
| Primary job | Sealing shipping boxes, tamper evidence, structural closure | Paint lines, surface protection, short-term holds, labeling |
| Heat & humidity | Holds in heat, cold, and humid trailers | Adhesive softens in heat; lifts in humid environments |
| Tamper evidence | High - tearing the tape damages the box face | None - peels off invisibly |
| Recyclability | Recyclable with the corrugated box | Generally not used on shipping boxes |
| Cost per roll | Higher per linear foot, but one strip seals most cartons | Lower per roll, but wrong tool for shipping |
| Application | Electric water-activated dispenser or pressure-sensitive hand roll | Hand-applied, no dispenser needed |
When to choose which
Choose kraft paper tape when: you are closing a shipping box, want tamper evidence, ship in humid or cold conditions, want a clean curbside-recyclable package, or care about the unboxing look (kraft has a premium natural finish).
Choose masking tape when: you are masking off paint, holding parts during assembly, labeling fixtures, bundling items inside a box (not as the closure), or any short-term hold where you need clean removal.
The mixed-use case: many shippers keep both - kraft tape on the outside of the carton, low-tack masking tape inside for bundling fragile parts so the inner protection comes off cleanly at unboxing.
Kraft tape vs masking tape FAQ
Can I use masking tape to seal a shipping box?
Not for anything that needs to survive the carrier network. Masking tape is engineered to release - it will lift off the carton in transit, fail in a hot trailer, and give a carrier a reason to refuse the package. Use kraft tape or carton sealing tape for the closure.
Why does kraft tape need water?
Water-activated kraft tape (also called gummed paper tape or WAT) uses a starch adhesive that is dry on the roll. Water reactivates the starch, which then bonds into the fibers of the corrugated box - creating a stronger seal than any pressure-sensitive tape can on a recycled-content carton.
Is there a pressure-sensitive kraft tape?
Yes. Self-adhesive kraft paper tape uses a rubber adhesive on a kraft backing - no water required. It has the natural look and recyclability of kraft, with the speed of a standard tape gun, but does not bond into the fibers the way WAT does.