Hazard Warning Signs

Hazard Warning Signs alert employees, visitors and contractors to potential dangers that may cause injury, illness or property damage. Recognisable by their yellow triangular design, these signs help identify workplace hazards before people enter an area or begin a task.

Also known as warning signs, danger warning signs or hazard alert signs, they are widely used in factories, warehouses, workshops, construction sites, schools, healthcare facilities and public buildings.

Common installation locations include machinery areas, electrical rooms, chemical storage facilities, loading bays, restricted access areas, plant rooms and workplace entrances where hazards need to be clearly communicated.

Available in self-adhesive vinyl, rigid plastic, aluminium and photoluminescent materials, many of our hazard warning signs are manufactured in the UK for excellent visibility, durability and long-lasting performance.

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Subcategories

Electrical Hazard Signs
Flammable & Explosive Signs
Hazardous Chemical Signs
Asbestos Warning Signs
Radiation & Specialist Signs
Temperature Warning Signs
Warning deep excavations safety sign with hazard symbol

Warning Deep Excavations Sign

Warns of deep excavation hazards to prevent accidents and ensure site safety
• Alerts workers and visitors to the presence of deep excavation risks
• Ideal for construction sites, civil engineering projects, and groundwork areas
• Bold black text on yellow background ensures high visibility
• Available in Rigid Plastic (1mm) and Self Adhesive Vinyl
• Helps reduce risk of falls and supports safer working environments
£4.88
Danger Explosive Atmosphere EX ATEX Category 3 safety sign with recognised EX hazard symbol

Danger Explosive Atmosphere Sign - EX Atex Category 3

Warn staff and visitors of explosive atmosphere hazards in ATEX Category 3 areas with this highly visible danger safety sign.
• Alerts personnel to explosive atmosphere hazards
• Suitable for industrial sites, refineries and hazardous zones
• High-visibility yellow and black design for clear recognition
• Available in Rigid Plastic (1mm), Rigid Plastic 1mm (Self Adhesive Back), Rigid Plastic (2mm), Rigid Plastic 2mm (Self Adhesive Back) and Self Adhesive Vinyl
• Helps reduce risk and improve workplace safety compliance
£2.71
Warning Men Working Below Sign with yellow hazard symbol

Warning Men Working Below Sign


Alerts workers and visitors to personnel working below ground level or in excavated areas.
• Warns of people working below to help prevent accidents
• Suitable for excavations, basements, construction sites, access routes and work zones
• Bold yellow warning design with clear black text and hazard symbol
• Available in Rigid Plastic (1mm), Rigid Plastic (2mm), Self Adhesive Vinyl and Recyclable Correx ® (4mm)
• Helps improve awareness around below-ground work areas
£10.81
Danger Electricity Electrical Hazard Sign

Danger Electricity Electrical Sign

Clearly warns people of dangerous electricity to help reduce the risk of serious electrical injury or accidents.
• Alerts people to the presence of dangerous electricity and electrical hazards
• Suitable for workplaces, construction sites and utility areas
• High-visibility yellow and black design provides clear and immediate recognition
• Available in Rigid Plastic (1mm), Rigid Plastic 1mm (Self Adhesive Back), Rigid Plastic (2mm), Rigid Plastic 2mm (Self Adhesive Back) and Self Adhesive Vinyl
• Helps reinforce electrical safety awareness and reduce the risk of electrical incidents
£2.71
Gas Cylinder Storage Sign

Gas Cylinder Storage Sign

Clearly identifies gas cylinder storage areas while communicating essential safety warnings and mandatory precautions to help reduce the risk of fire and unauthorised access.
• Indicates designated gas cylinder storage areas and essential safety precautions
• Ideal for gas bottle stores, industrial sites, workshops, warehouses and commercial premises
• High-visibility colour coding with clear text and recognised safety symbols
• Available in Aluminium Composite (3mm), Rigid Plastic (1mm), Rigid Plastic (2mm) and Self Adhesive Vinyl
• Helps promote safe storage practices and improve workplace safety awareness
£12.46
Warning Men At Work safety sign with warning hazard symbol

Warning Men At Work Sign

Warn staff, visitors and the public of active work areas with this highly visible warning safety sign.
• Indicates active work zones to improve safety awareness
• Ideal for construction sites, industrial areas and maintenance zones
• High-visibility yellow and black design for clear recognition
• Available in Rigid Plastic (1mm), Rigid Plastic (2mm) and Self Adhesive Vinyl
• Helps reduce accidents by warning people of ongoing work activities
£8.10
Danger Of Death Electrical Hazard Sign

Danger Of Death Electrical Sign

Clearly warns people of a potentially lethal electrical hazard to help prevent serious injury or fatal accidents.
• Alerts people to the presence of dangerous electrical risk
• Suitable for industrial sites, plant rooms and electrical areas
• High-contrast yellow and black design provides clear visibility and immediate recognition
• Available in Rigid Plastic (1mm), Rigid Plastic 1mm (Self Adhesive Back), Rigid Plastic (2mm), Rigid Plastic 2mm (Self Adhesive Back) and Self Adhesive Vinyl
• Helps reinforce critical electrical safety awareness in high-risk areas
£2.71
Warning Site Entrance safety sign with yellow warning symbol

Warning Site Entrance Sign


Warn individuals of potential hazards when entering a site with this Warning Site Entrance Sign.
• Alerts people to hazards at site entry points
• Ideal for construction sites, industrial areas and work zones
• High-visibility yellow and black design ensures clear recognition and readability
• Available in Rigid Plastic (1mm), Rigid Plastic (2mm) and Self Adhesive Vinyl
• Helps improve site safety awareness and supports compliance with workplace safety requirements
£8.10
Danger Of Death High Voltage Electrical Hazard Sign

Danger Of Death High Voltage Electrical Sign

Clearly warns people of potentially fatal electric shock from high voltage sources to help prevent serious injury or death.
• Alerts people to dangerous high voltage electrical hazards
• Suitable for electrical rooms, substations, plant areas and restricted zones
• Bold yellow and black design provides high visibility and instant recognition
• Available in Rigid Plastic (1mm), Rigid Plastic 1mm (Self Adhesive Back), Rigid Plastic (2mm), Rigid Plastic 2mm (Self Adhesive Back) and Self Adhesive Vinyl
• Helps reinforce electrical safety awareness around high voltage hazards
£2.71
Warning Site Traffic safety sign with warning hazard symbol

Warning Site Traffic Sign

Warn staff, visitors and drivers of moving site traffic with this highly visible warning safety sign.
• Alerts people to the presence of moving site traffic
• Suitable for construction sites, industrial yards and loading areas
• High-visibility yellow and black design for clear recognition
• Available in Rigid Plastic (1mm), Rigid Plastic (2mm), Self Adhesive Vinyl and Recyclable Correx ® (4mm)
• Helps reduce accidents by increasing awareness of vehicle movement
£10.81
Mains Switch Electrical Hazard Sign

Mains Switch Electrical Sign

Clearly identifies the location of a mains electrical switch while warning people of the associated electrical hazard.
• Indicates the presence and location of a mains electrical switch
• Suitable for plant rooms, electrical cupboards and commercial premises
• High-contrast yellow and black design provides clear visibility and quick recognition
• Available in Rigid Plastic (1mm), Rigid Plastic 1mm (Self Adhesive Back), Rigid Plastic (2mm), Rigid Plastic 2mm (Self Adhesive Back) and Self Adhesive Vinyl
• Helps improve safety awareness around electrical control points
£2.71
Danger Overhead Cables Height Limit electrical warning sign with electrical hazard symbol

Danger Overhead Cables Height Limit Electrical Sign

Warn staff, contractors and visitors of overhead electrical cables and height restrictions with this highly visible danger sign for hazardous environments.
• Alerts people to overhead cable hazards and height restrictions
• Suitable for construction sites, industrial areas and access routes
• High-visibility yellow and black design for clear recognition
• Available in Rigid Plastic (1mm), Rigid Plastic (2mm) and Self Adhesive Vinyl
• Helps reduce the risk of vehicles or equipment striking live overhead cables
£14.77