Small details, big consequences - That’s why we recommend Rubber plug for ISO holes
In maritime environments, corrosion often starts in overlooked details rather than in the main container structure. Open ISO holes in corner castings can collect moisture, dirt, and salt over time, increasing the risk of internal corrosion and accelerating visible wear. Covering unused ISO holes is a simple measure that can help extend container service life and reduce maintenance needs.
Corrosion rarely starts where you expect.
In maritime and offshore environments, corrosion rarely begins on large, visible surfaces.
It usually starts in the details — corners, joints, and open ISO holes that are often overlooked in daily operation.
The ISO holes in a container’s corner castings are an integral part of the construction.
They are designed for lifting, securing, and twistlocks — and in themselves, they are not a flaw.
The issue arises when containers are exposed to weather for long periods and the ISO holes are not in use.
In practice, we often observe:
💧water and debris collecting inside the corner castings
💧moisture becoming trapped in the structure
💧corrosion starting from the inside
💧containers appearing more rusted than their actual structural condition suggests
These effects are rarely immediate.
But over time, small details can have a significant impact on container lifespan, maintenance requirements, and overall appearance.
These observations are based on our day-to-day work with containers used in maritime and offshore applications at Specialcontainer.
Recommended solution:
Rubber plug for ISO holes
👉 https://specialcontainer.dk/en/produkt/gummiprop-til-iso-huller/
Have questions? We’re ready to help!
📞 +45 22 66 46 38
📧 info@specialcontainer.dk – we’ll help you find the best solution for your needs!
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