What Does Wind and Water-Tight (WWT) Mean?
A Wind and Water-Tight container is designed to prevent water intrusion and block wind from entering the interior under normal weather conditions.
To qualify as WWT, a container must:
- Have solid steel walls, roof, and doors
- Close and seal properly at the doors
- Have no holes, cracks, or structural openings
- Keep contents dry during rain and storms
How Are Containers Made Wind and Water-Tight?
Shipping containers achieve wind and water tightness through:
- High-strength steel construction
- Rubber door gaskets that seal when doors are closed
- Welded steel panels and reinforced seams
- Marine-grade paint and protective coatings
WWT vs Cargo-Worthy Containers
While all cargo-worthy containers are wind and water-tight, not all WWT containers are cargo-worthy.
- Wind and Water-Tight (WWT): Suitable for storage and most on-site uses
- Cargo-Worthy: Certified safe for international shipping
WWT containers may show cosmetic wear such as dents or surface rust but remain fully sealed from the elements.
Are All Used Containers WWT?
Not automatically. Our As-Is grade includes wind and water-tight units and lower-grade units, and condition varies. Containers are sold by size and grade, as-is, and depots are not open for individual inspection. See our Terms of Sale.
Common Uses for WWT Containers
- Equipment and tool storage
- Construction site storage
- Residential storage
- Workshops and container modifications
Bottom Line
If you need a container you can count on to stay sealed, choose New, IICL or Cargo Worthy. Check the grade on your quote before you buy.