Dry Bag Manufacturing
TPU Dry Bags: Material, Welding & Applications
Direct answer
TPU dry bags use thermoplastic polyurethane film or coated fabric, welded with RF/high-frequency or hot-air seams. TPU is lighter, more flexible and more UV-stable than PVC, which makes it ideal for premium, packable dry bags - at a slightly higher material cost.
TPU properties
| Property | TPU performance |
|---|---|
| Waterproofing | Excellent - fully weldable seams, IPX7/IPX8 capable |
| Flexibility | High, stays soft in cold weather |
| UV resistance | Better than PVC; less cracking over time |
| Weight | Lighter than PVC of equal thickness |
| Cost | Higher than PVC |
Where TPU dry bags are used
- Ultralight backpacking and bikepacking dry bags
- Premium roll-top dry bags for kayaking and SUP
- Phone pouches and transparent dry bags
- Packable tote and travel dry bags
Compare materials in TPU vs PVC vs nylon, or request TPU pricing via our contact form.