Hot melt tape is the better default for shipping boxes that leave soon after packing, especially recycled or overstuffed cartons sealed at room temperature: on manufacturer data sheets it shows about twice the peel adhesion of comparable acrylic tape. Acrylic tape is the better choice for cold packing areas, cartons stored for months, and boxes that sit in sunlight, because manufacturers rate it for wider application temperatures and for resistance to aging and yellowing. Both are pressure-sensitive and go on with the same hand dispenser.
Acrylic vs. hot melt on the data sheets
These figures come from the manufacturers’ own technical data. Peel adhesion is measured on stainless steel (ASTM D3330), so treat it as a comparison between tapes, not a prediction of how a seam holds on cardboard.
| Tape | Adhesive | Total thickness | Peel adhesion | Application temperature | Maker’s stated use |
|---|---|---|---|---|---|
| 3M Scotch 3071 | Hot melt rubber-resin | 2.1 mil | 45 oz/in | Easiest at room temperature; adhesive firms near 32°F | Adheres well to recycled corrugate |
| Shurtape HP 100 | Hot melt synthetic rubber/resin | 1.6 mil | 43 oz/in | 35°F to 110°F | General purpose, lightweight cartons |
| IPG hot melt line (standard grades 6100 to 1100) | Hot melt | 1.6 to 3.0 mil | 32 to 46 oz/in | Not stated per grade | Light to extra-heavy boxes; premium grades for under- or overstuffed boxes |
| 3M Scotch 311 | Acrylic | 2.05 mil | 22 oz/in | Good results at 32°F to 50°F | Light to medium boxes; good aging in sunlight |
| IPG acrylic line (191 to 341) | Acrylic | 1.91 to 3.0 mil | 18 to 22 oz/in | “All-temperature” (below 40°F and above 120°F) | Where aging, weathering, UV and yellowing resistance matter |
The pattern is consistent across brands. Hot melt has the stronger, faster grab and is what manufacturers recommend for recycled and overstuffed cartons. Acrylic gives up peel strength in exchange for a wider temperature window and better resistance to sunlight and age.
Which tape to use
| Situation | Use | Why |
|---|---|---|
| Daily orders packed indoors and picked up the same week | Hot melt | Highest peel adhesion; quick grab on corrugate |
| Recycled, reused or overstuffed cartons | Hot melt, in a heavier grade for overstuffed boxes | 3M rates its 3071 hot melt for recycled corrugate; IPG lists its premium hot melt grades for under- or overstuffed boxes |
| Unheated garage, cold dock or winter packing below about 35°F | Acrylic, or a hot melt grade rated for cold | Standard hot melt like Shurtape HP 100 has a 35°F minimum application temperature; 3M 311 acrylic has sealed boxes well at 32°F to 50°F |
| Cartons stored for months, near windows, or in hot rooms | Acrylic | 3M and IPG cite acrylic’s resistance to sunlight, aging and yellowing |
| Dusty, very rough or humid conditions | Natural rubber tape | IPG recommends its natural rubber grades for these “problem” applications |
| You need to see whether a box was opened | Printed security tape | See tamper-evident options below |
Temperature: application vs. service
Data sheets list two ranges, and they answer different questions:
- Application temperature is the range for the tape and carton when you seal the box. Shurtape HP 100 hot melt is rated 35°F to 110°F. 3M says its 3071 hot melt is easiest to apply at room temperature and firms up as it approaches 32°F, while its 311 acrylic has sealed fiberboard boxes well at 32°F to 50°F.
- Service temperature is the range a sealed box can sit in afterward. Shurtape rates HP 100 for -20°F to 150°F once applied, and 3M says 311 keeps performing on boxes held below 32°F.
If you pack in a cold space, bring the tape and the empty cartons indoors to warm up before sealing, or buy a tape whose minimum application temperature covers your room. IPG, for example, sells “Cold Temp” hot melt grades (7151QT and 6151QT) for cooler and moving-and-storage use.
Storing tape rolls
Both 3M and Shurtape give the same basic storage instruction: keep rolls in the original packaging, in a cool, dry place out of direct sunlight. 3M specifies 40°F to 80°F at 40 to 50% relative humidity and recommends using its tape within 18 months of manufacture. Shurtape says to use HP 100 within 12 months of shipment. Buy cases you will use inside that window rather than a multi-year supply.
Width and how many strips
USPS asks shippers to close and secure all seams with 2-inch-wide packing tape and not to use string, cord or twine (USPS packing guidance ). Standard “2-inch” rolls are 48 mm (1.88 in) wide; the next common width is 72 mm (about 2.8 in), which covers more of the seam on large or heavy boxes. UPS recommends three strips of tape across the top and bottom of a regular slotted box, covering the center seam and both edge seams, and says not to use masking, cellophane or duct tape (UPS Packaging Guidelines ).
The tape application guide covers technique, and 2 mil vs. 3 mil tape covers backing thickness. For heavy cartons, see shipping tape for heavy boxes .
Tamper-evident and other tape types
- Printed security tape shows when a box has been opened and resealed. 3M’s Scotch 3199, for example, is an acrylic tape printed with red diagonal lines and “Check Seal Before Accepting,” with the same 2.05 mil total thickness as 3M 311.
- Water-activated paper tape is a separate system that must be moistened before it sticks. UPS’s packaging guidelines list water-activated paper tape among the tapes not to use for its network, so check your carrier before switching.
- Filament (strapping) tape is for bundling and reinforcement, not routine seam sealing. See shipping tape vs. strapping tape .
Color does not have to mean a different tape: IPG lists its colored acrylic 321 with the same thickness, peel and tensile figures as its clear 400. Whatever the color, UPS says not to place the shipping label on top of sealing tape or across a seam.
Reading a tape data sheet
When comparing rolls, ask the seller for the technical data sheet and check:
- Adhesive type: hot melt (synthetic rubber/resin), acrylic, or natural rubber.
- Total thickness vs. backing thickness: 3M lists both (for 3071, 1.2 mil backing and 2.1 mil total, measured by ASTM D3652). Compare total thickness to total thickness.
- Peel adhesion (ASTM D3330): how hard the tape holds to a test surface.
- Tensile strength (ASTM D3759): how much pull the backing takes before breaking, per inch of width.
- Holding power (ASTM D3654): how long the tape resists sliding under a load; IPG’s hot melt grades range from 2,500 to 40,000 minutes on liner board (85,000 for its PET specialty tape).
- Application and service temperature ranges, described above.
- Width and core size: 3M lists 48 mm and 72 mm widths on a 3-inch core. Check the core against your dispenser (3-inch vs. 1-inch cores ).
Shurtape notes that its figures come from PSTC and ASTM test methods and are averages, not guarantees, so use them to compare tapes rather than to predict a specific box.
Sources
- 3M Scotch Recycled Corrugate Tape 3071 data sheet : hot melt adhesive, 2.1 mil total thickness, 45 oz/in peel adhesion, recycled corrugate use, cold application behavior, storage and 18-month shelf life, standard widths.
- 3M Scotch Box Sealing Tape 311 data sheet : acrylic adhesive, 2.05 mil, 22 oz/in peel adhesion, sealing at 32°F to 50°F, sunlight aging, light-to-medium boxes.
- 3M Scotch Security Message Box Sealing Tape 3199 data sheet : printed tamper-evident acrylic tape.
- Shurtape HP 100 product page : hot melt adhesive, 1.6 mil, 43 oz/in, 35°F to 110°F application and -20°F to 150°F service temperatures, storage and 12-month use window, PSTC/ASTM test basis.
- IPG carton sealing tape brochure : hot melt, acrylic and natural rubber grades, peel adhesion and holding power ranges, cold-temperature hot melt grades, acrylic temperature and UV positioning, colored acrylic specs.
- USPS: How to Prepare & Send a Package : 2-inch-wide packing tape on all seams; no string or twine.
- UPS Packaging Guidelines : three-strip taping, tapes not to use (masking, cellophane, duct, water-activated paper), and no labels on top of sealing tape.
FAQ
Is hot melt shipping tape applied with heat?
No. Hot melt names the adhesive family (synthetic rubber and resin). The finished tape is pressure-sensitive and goes on at room temperature with a hand dispenser; Shurtape rates its HP 100 hot melt tape for application between 35°F and 110°F.
Which shipping tape is better for cold weather?
Acrylic, unless you buy a hot melt grade made for cold. 3M says its 311 acrylic tape seals boxes well at 32°F to 50°F, while its 3071 hot melt tape firms up as it approaches 32°F. IPG sells separate cold-temperature hot melt grades for coolers.
Is acrylic tape strong enough for shipping boxes?
Yes for light to medium cartons, which is what 3M rates its 311 acrylic tape for. Acrylic tapes show roughly half the peel adhesion of hot melt on data sheets, so for heavy, overstuffed or recycled cartons a premium hot melt grade is the safer choice.
Should I use 2-inch or 3-inch shipping tape?
USPS asks for 2-inch-wide packing tape on all seams, and standard 2-inch rolls are 48 mm (1.88 in) wide. Wider 72 mm (about 2.8 in) rolls cover more of the seam on large or heavy cartons. UPS recommends three strips across the top and bottom of a regular slotted box.