Keep Locked Shut Sign
Ensure designated doors remain securely locked and shut with this highly visible Keep Locked Shut sign.
• Clearly instructs that designated doors must be kept locked and shut
• Ideal for fire doors, restricted access areas, secure rooms and commercial premises
• Bold white text on a blue mandatory symbol ensures excellent visibility
• Available in Extra Glow in the Dark Self Adhesive (Class C), Extra Glow in the Dark Rigid Plastic (Class C), Extra Glow in the Dark Rigid Plastic (Self Adhesive Back), Rigid Plastic (1mm), Rigid Plastic 1mm (Self Adhesive Back), Rigid Plastic (2mm), Self Adhesive Vinyl and Self Adhesive Vinyl (Aluminium Effect)
• Supports security, access control and workplace safety procedures
Product Overview
The Keep Locked Shut Sign provides a clear mandatory instruction reminding staff and authorised personnel that designated doors must remain locked and shut. Featuring bold white text on a blue circular background, this highly visible sign helps improve site security, control access to restricted areas and reinforce workplace safety procedures across commercial, industrial and public buildings.
Where to Use
- Restricted access areas
- Fire doors
- Commercial buildings
- Warehouses
- Plant rooms and secure facilities
Key Features
- Displays a clear mandatory instruction
- Recognised blue mandatory sign design
- Bold white text for excellent visibility
- Suitable for secure doors and restricted areas
- Available in multiple durable material options
Materials & Options
- Extra Glow in the Dark Self Adhesive (Class C)
- Extra Glow in the Dark Rigid Plastic (Class C)
- Extra Glow in the Dark Rigid Plastic (Self Adhesive Back)
- Rigid Plastic (1mm)
- Rigid Plastic 1mm (Self Adhesive Back)
- Rigid Plastic (2mm)
- Self Adhesive Vinyl
- Self Adhesive Vinyl (Aluminium Effect)
Compliance
This sign supports compliance with UK health and safety regulations, including:
- Health and Safety at Work etc. Act 1974
- Safety Signs and Signals Regulations 1996
Frequently Asked Questions
Where should this sign be installed?
Install it directly on or adjacent to doors that must remain locked and shut so the instruction is clearly visible before entry.
Is this sign suitable for low-light conditions?
The Extra Glow in the Dark material options remain visible after exposure to normal lighting, making them ideal for emergency situations and low-light environments.
What does this sign indicate?
It provides a mandatory instruction that the designated door must be kept locked and shut to improve security, restrict unauthorised access and support workplace safety procedures.
Trade Discounts
Rainbow Safety supplies safety signs to trade professionals across the UK.
Our trade customers include:
- Fire safety service companies
- Fire risk assessors and safety consultants
- Electrical wholesalers
- Facilities management companies
Approved trade customers receive:
- Preferential trade discounts
- Better margins for reselling safety signs
- Marketing support to help you sell more signs
- Access to our full range of safety signs
With the support and marketing tools provided, our sales have grown to over £3,000 per month.
Fire extinguisher servicing margins are not what they used to be, so supplying safety signs has become a valuable additional revenue stream for our business. On one warehouse safety survey alone we £5,100 in a single order.
Previously we were regularly asked to supply safety signs but couldn’t compete with internet prices while maintaining healthy margins. Working with rainbowsafety.co.uk.
Loyalty Rewards
Rainbow Safety rewards regular customers across the UK who order safety signs on an ongoing basis.
- Schools and colleges
- Facilities management companies
- Contractors and maintenance teams
- Offices and commercial premises
- Preferential pricing for regular customers
- Free design service for custom safety signs
- Access to exclusive promotional offers
- Dedicated account manager if required
“Rainbow Safety has become our go-to supplier for safety signs.”
We regularly need safety signs for maintenance work, refurbishments and ongoing compliance updates. Since ordering from Rainbow Safety, the process has been straightforward, reliable and cost-effective.
The loyalty rewards and special offers have helped us save money across repeat orders, while the wide product range means we can usually source everything we need in one place.
Fast ordering, consistent quality and ongoing rewards have made Rainbow Safety a valuable supplier for our business.
Reviews
Very professional looking sign with sharp printing and bright, clear text. It has improved awareness around our secure doors considerably.
Excellent quality sign with very clear lettering and a professional finish. It was easy to install and works perfectly for our restricted access area.




Reliable and well-made sign that arrived promptly and was simple to mount. It still looks great despite daily use in a busy environment.