Are shipping containers wind and watertight?

Containers need to be wind and watertight (WWT) to transport cargo across the ocean.

Because shipping containers are made for transporting cargo across the ocean on the decks of ships, they need to be wind and watertight to avoid damaging the contents of the units. 

WWT containers are hole-less and have heavy duty rubber door seals to prevent water and other contaminants from entering any gaps between doors and walls. Used containers that aren't WWT may have damaged door seals or holes, but we ensure any of these damages are repaired before delivery.