Shipping Container Lock Box & High-Security Padlock

Protect your shipping or storage container with our patented Contain-A-Lock® Padlock Protector Shroud, trusted by many businesses and private storage customers across Great Britain. Engineered to prevent theft, cutting and tampering, this heavy-duty lock box shields your padlock and safeguards your container contents. 

The Contain-A-Lock® system can be welded before delivery or supplied with fitting instructions, giving you total flexibility when securing your container. 

Key Features of the Contain-A-Lock® System

Below is a quick summary of why customers choose our patented padlock protector lock box for maximum security. For more detailed specifications, download our product specification sheet below.

  • Made from heavy-duty 4mm heat-treated steel for high cut resistance and long-term durability. 
  • Tamper-proof and corrosion-resistant, ensuring consistent performance in harsh outdoor environments. 
  • With a built-in lock retention system, your padlock securely hangs inside the shroud while you access your container, so it can’t be misplaced. 
  • Clean, low-maintenance design that is easy to operate. 
  • Supplied with the high-security CISA 285/75 padlock.
Product Specification Sheet
A close-up view of a green shipping container door fitted with a Contain-A-Lock steel lock box. The lock box features an instruction label explaining how to operate the locking system, and the container’s vertical locking bars and metal fixings are visible around it.
A welder wearing a red welding helmet and protective gloves installs a Contain-A-Lock box onto a green shipping container door. Bright sparks are visible as the lock box is welded into place, with the container’s locking bars running vertically beside the work area.
A Contain-A-Lock unit fitted to a green shipping container door, shown with a padlock inserted into the lock box mechanism. The printed operating instructions on the box are clearly visible, along with the container’s metal locking bars.
A white Contain-A-Lock box installed on a light-coloured shipping container door. The instruction label is clearly displayed, and the surrounding vertical locking bars and fixings frame the lock box.

Why Choose the CISA Shipping Container Padlock?

The CISA 285/75 security padlock is an insurance-rated, premium padlock specifically designed for shipping container applications.

Featuring a hardened steel shackle, anti-corrosion treatment, pick/drill resistant barrel, and bespoke keying options, it provides reliable, long-term protection.

Ideal for use with our Contain-A-Lock® system, the padlock is compatible with all 10ft, 20ft and 40ft shipping containers, including high cube units.

A close-up of a person holding a silver CISA hardened padlock with keys attached, positioned next to the blue steel locking box on a shipping container door. The padlock is shown aligned as if ready to be inserted into the lock housing, with the container’s coloured units blurred in the background.

Guide to Installing and Using Your Container Lock Box

Whether welded by us or supplied for self-installation, our shipping container lock box includes clear, easy-to-follow instructions for fitting and removing the padlock.

The main advantage of our system is that the padlock remains fully protected inside the shroud when the cargo doors are opened – a unique and user-friendly design that prevents you from losing the lock while organising your storage.

Watch our quick padlock installation video or download our full guide to see exactly how the system works.

Contain-A-Lock® Guide
A blue Contain-A-Lock shroud fitted to a blue shipping container door, with an instruction label showing how to operate the locking system. The shroud is mounted over the door’s central locking bar, and the surrounding container doors and metal fixings are visible in the background inside an indoor workshop setting.

Secure Your Container Storage Today

With over 40 years in the shipping container industry, we supply quality units across Great Britain, with many customers choosing our Contain-A-Lock® Padlock Protector Shroud for added security and peace of mind.

Customers choose us for:

  • Nationwide delivery 
  • Competitive pricing 
  • Expert support (98% recommend us)

From London to Glasgow, Birmingham to Manchester, we can help you secure your container with proven, high-quality lock solutions.

Call 01922 741751 or complete the form below for a tailored quote and to discuss the best security options for your container.

A white Contain-A-Lock protector shroud installed on a white shipping container door. The printed operating instructions are clearly visible on the front, and the metal locking bars run vertically on either side. A padlock shackle protrudes slightly from the bottom of the shroud, showing the lock mechanism in place.

Get a Quick Quote

Simply enter your details below, and you’ll receive a price quote on the shipping container that’s right for you. With a range of single trip (new) and used shipping containers for sale, we provide quality storage solutions for all budgets and needs.

Didn’t find what you were looking for?

Just get in touch and we’ll guide you to the best option.

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Container Security FAQs

What is the best lock for a shipping container?

The most secure option is a high-security padlock with a padlock protector shroud. Our patented Contain-A-Lock® Padlock Protector combined with the CISA 285/75 security padlock provides maximum resistance against tampering – making it the ideal lock for shipping and storage containers.

How do I make my shipping container more secure?

Start by upgrading the locking system. Standard container handles don’t provide enough protection, but adding a padlock protector shroud prevents criminals from accessing the padlock with tools. For extra security, choose a CISA padlock and consider positioning your container in a well-lit, secure location.

Can I fit a container padlock protector myself?

Yes. The Contain-A-Lock® system can be supplied with instructions for customers to weld on themselves, or it can be factory-welded before delivery for a ready-to-use solution.

Are container padlocks weather resistant?

Yes. The CISA 285/75 padlock supplied with our Contain-A-Lock® is built with nickel-plating and anti-corrosion treatment, making it highly resistant to rust, moisture, and harsh UK weather conditions.

Are CISA padlocks insurance rated?

Yes. The CISA 285/75 lock is insurance rated, designed to meet commercial and business security requirements. This makes it suitable for self storage sites, construction projects, and private use where insurance compliance is important. Please contact our team for further information.