Even if your shipping container looks clean when it arrives, it’s likely traveled across oceans, through multiple depots, and carried various types of cargo. Whether you purchased a used container or a one-trip container, cleaning it properly before first use is essential for safety, hygiene, and long-term performance.

At YES Containers, we always recommend giving your container a complete clean and inspection before loading or converting it. Here’s why and how to do it right.

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Why You Should Clean Your Shipping Container

Containers Travel Through Harsh Environments

Every shipping container, new or used, has been through port terminals, weather exposure, and sometimes extended yard storage. Even if it looks clean on the surface, it may still have:

Dust, pollen, or residue from previous cargo
Stickers or markings from older shipments
Musty smells or oil spots from the yard

Cargo History and Hidden Contaminants

Containers often carry electronics, cars, coffee, flour, plastic materials, or other goods that leave behind residues or odors. While all containers are inspected for safety and non-hazardous use before sale, that doesn’t mean they’re spotless.

Some might have white powder residue (often flour or plaster), mild smells, or stains. Don’t panic — these are normal for used units. Containers sold by reputable companies like YES Containers are inspected inside and out before delivery, but it’s smart to clean them again yourself.

Step-by-Step Guide: How to Clean a Shipping Container

1. Initial Inspection

Before cleaning, do a full walkaround:

Look for rust, dents, or corrosion spots.
Check for any pinhole leaks by inspecting the roof and walls from the inside during daylight.
Note any stains or spills inside.

If you spot visible rust or scratches, read our guide on how to fix rust on a shipping container for maintenance tips.

2. Dry Cleaning: Sweep or Blow Out Dust and Debris

Start cleaning from the back toward the front doors.
Use:

A broom or shop vacuum for loose debris
A leaf blower or air compressor to remove dust and pollen
Always wear eye protection and a face mask to avoid inhaling dust

Blowing air through the container helps remove loose contaminants, pollen, and leftover packing debris.

3. Power Washing the Interior and Exterior

Once the dry cleaning is done, pressure wash the container:

Start from the inside back wall and move toward the doors.
Pay attention to corners, roof seams, and floor edges — these trap dirt easily.
Use mild detergent or diluted vinegar for stains or smells.

Always wear safety glasses or goggles when pressure washing inside — water and debris can ricochet in confined spaces.

After cleaning, allow the container to dry completely before further inspection.

If you find any paint flaking or heavy rust, you can repair or repaint your container using the methods in our container painting and maintenance guide.

4. Inspect for Damage and Rust After Cleaning

Once your container is dry, walk around it again:

Look for rust flakes that may have come loose during washing.
Check for leaks or thin metal areas exposed by cleaning.
Sand any corroded spots using medium-grit sandpaper or a belt sander.

You don’t need to remove all the original paint — just sand off peeling or rusty areas before repainting.

5. Repaint and Protect the Surface

After sanding, it’s time to seal and protect the cleaned metal:

Use marine-grade DTM (Direct to Metal) paint to coat the surface.
Apply 2–3 coats evenly for maximum protection.
For a 20ft container, use about 4 gallons of paint; for a 40ft container, use 8 gallons.

If you plan to use your container for housing, storage, or commercial use, repainting also helps extend its lifespan and improve appearance.

6. Clean or Replace the Flooring

Many containers have plywood flooring that may be stained or retain odors.
Inspect carefully:

Sweep and vacuum all dirt and dust.
Use a mild detergent and scrub brush for stains.
For strong odors or damage, consider a floor replacement or repair.

For guidance, check out how to repair shipping container floors and choose replacement-grade materials suitable for heavy-duty storage.

Maintenance Tip: Power Wash After Delivery

Even if your container arrives in good shape, it’s smart to power wash and repaint it shortly after delivery. This ensures the coating stays intact and corrosion-free, especially if your container will be used outdoors long-term.

You can schedule delivery and cleaning assistance through our Shipping Container Delivery Service.

Frequently Asked Questions (FAQ)

1. Do all shipping containers need to be cleaned before use?

Yes. Whether new or used, all containers should be cleaned to remove dust, odors, or residues from previous cargo and transport.

2. Can I use bleach or harsh chemicals?

No. Stick to mild soap, vinegar, or non-toxic degreasers — harsh chemicals may damage paint and flooring.

3. How often should I clean my container?

Inspect and clean once or twice a year, especially if exposed to outdoor elements or used for storage turnover.

4. Can cleaning reveal hidden problems?

Yes. Power washing may expose rust, pinholes, or leaks, allowing you to repair them early before structural damage occurs.

5. Should I paint my container after cleaning?

It’s highly recommended — repainting protects against rust, UV damage, and moisture. Learn more in our rust prevention guide.

Conclusion

A clean shipping container is a safe, durable, and long-lasting one.
Taking the time to properly clean, inspect, and repaint your container before first use ensures you get the most out of your investment — whether it’s for storage, construction, or conversion.

At YES Containers, we provide new, used, and custom containers that meet strict quality standards — ready to be cleaned, sealed, and put to work on your property.

📞 Call (800) 223-4755 | Get a Quote | Buy or Rent a Container | Learn More About Container Maintenance

Related Resources:

How to Clean Your Shipping Container Before Using It for the First Time