Shrink Wrap vs Stretch Wrap: The Difference and When to Use Each

Shrink wrap and stretch wrap get used interchangeably in conversation, but they are different materials, applied differently, for different jobs. Picking the wrong one wastes money or leaves your load exposed. Here is the clear difference — and an important point both of them miss.

The core difference: heat vs tension

• Stretch wrap (pallet wrap) is an elastic film wound around the load under tension. Its own stretch holds the items together. No heat. It is the standard for unitising a pallet.
• Shrink wrap is a film placed loosely around the product and then heated (heat gun or tunnel) so it shrinks and conforms tightly to the exact shape of the contents.

One uses elasticity; the other uses heat. That single difference drives everything else.

What each is for

When to use which

• Securing a pallet for transport: use stretch wrap. It is designed to hold cased or boxed products in a uniform position on the pallet and is more cost-effective for high-volume shipments.
• Protecting individual products for retail or shelving: use shrink wrap. It seals out moisture, dirt and air and conforms to the product.
• Weatherproofing a whole pallet (e.g. outdoor storage): a shrink pallet cover can be used, but it is rarely the everyday choice for transport unitising.

In short: stretch to unitise a pallet, shrink to seal a product. Most dispatch floors use stretch wrap on pallets and reserve shrink wrap for retail-facing or moisture-critical items.

The job neither one does

Here is the point both materials share, and it matters: neither shrink nor stretch wrap anchors the load to the pallet. Both wrap the boxes — to each other (stretch) or individually (shrink) — but the unitised block can still slide off the pallet deck under heavy vibration or a sudden jolt, because film provides little vertical anchoring.

For light loads, wrap alone is fine. For medium and heavy loads, the complete method is strap to secure, then wrap to protect:

• Strapping passes tensioned strap under the pallet and over the load, anchoring it to the base — the securing.
• Wrapping (stretch, usually) adds the dust/moisture barrier and unitises the boxes — the protection.

A calibrated machine such as the ErgoPack 726X, GO or 700 handles the anchoring repeatably on every pallet. See pallet strapping vs stretch wrapping for the full cost and stability comparison, and how to stretch wrap a pallet for the wrapping technique.

Quick reference

• Unitising a pallet for transport → stretch wrap
• Sealing an individual product / retail item → shrink wrap
• Weatherproof whole-pallet cover → shrink cover (niche)
• Remember: both protect and unitise; neither anchors to the pallet
• Medium/heavy loads → strap first, then wrap

Use stretch to unitise, shrink to seal — and strap to actually secure the load to the pallet.