Flammable & Explosive Signs

Flammable Signs warn employees, contractors and visitors about materials, substances or areas where there is a risk of fire or ignition. They help clearly identify flammable liquids, gases, chemicals and storage areas where extra care is required.

Also known as flammable warning signs, flammable hazard signs, fire risk signs and highly flammable signs, they are commonly used in workplaces where fuels, solvents, aerosols, chemicals or combustible materials are stored or handled.

These signs are used by factories, warehouses, laboratories, workshops, construction sites, garages, schools, facilities managers and chemical storage areas. Typical locations include fuel stores, COSHH cabinets, plant rooms, loading areas, workshops and external storage compounds.

Manufactured in the UK, our flammable signs are available in self-adhesive vinyl, rigid plastic and aluminium to suit both indoor and outdoor workplace environments.

LPG Highly Flammable Sign
Warns that LPG and highly flammable substances are present in the area.
• Alerts people to the presence of highly flammable LPG gas
• Suitable for industrial sites, storage areas, and fuel handling zones
• High-contrast yellow and black design ensures clear visibility
• Available in durable materials for long-lasting performance
• Helps reduce fire risk and improves workplace safety awareness
Danger Highly Flammable Store Sign
Danger Highly Flammable Store Sign clearly warns people of a highly flammable storage area and the associated fire hazard.
• Alerts people to the presence of a highly flammable store
• Suitable for warehouses, storage rooms and industrial sites
• High-visibility yellow and black design provides clear hazard 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 fire hazard awareness around flammable storage areas
Flammable Symbol Sign
Flammable Symbol Sign clearly warns people of the presence of flammable materials using a recognisable flame hazard symbol.
• Alerts people to the presence of flammable substances or materials
• Suitable for workplaces, storage areas and industrial environments
• High-visibility yellow and black design provides clear hazard recognition
• Available in Rigid Plastic (1mm), Rigid Plastic (2mm) and Self Adhesive Vinyl
• Helps reinforce fire risk awareness around flammable materials
Warning Fire Risk Flammable Sign
Warns of fire risk due to flammable substances in the area.
• Alerts people to the presence of flammable materials and fire hazards
• Suitable for workplaces, storage areas, and industrial environments
• High-visibility yellow and black design ensures clear recognition
• Available in durable materials for long-lasting performance
• Helps reduce fire risk and promotes safer working conditions
Highly Flammable LPG Multi Purpose Sign
Highly flammable LPG multi purpose sign designed to warn of flammable gas hazards and prohibit smoking or naked lights in hazardous areas.
• Helps alert individuals to highly flammable LPG and associated ignition risks
• Suitable for gas storage areas, fuel handling zones, industrial sites, and workshops
• High-visibility colours and prohibition symbols ensure strong readability and quick recognition
• Manufactured from Aluminium Composite (3mm), Rigid Plastic (1mm), Rigid Plastic (2mm), and Self Adhesive Vinyl
• Supports improved fire safety awareness and helps reduce the risk of fire and explosion incidents
Petroleum Spirit Highly Flammable Multi Purpose Sign
Petroleum spirit highly flammable multi purpose sign designed to warn of flammable substances and prohibit smoking or naked lights in hazardous areas.
• Helps alert individuals to highly flammable petroleum spirit and associated ignition risks
• Suitable for fuel storage areas, workshops, industrial sites, and hazardous material zones
• High-visibility colours and clear prohibition symbols ensure strong readability and quick understanding
• Manufactured from Aluminium Composite (3mm), Rigid Plastic (1mm), Rigid Plastic (2mm), and Self Adhesive Vinyl
• Supports improved fire safety awareness and helps reduce the risk of fire and explosion incidents
Danger Flammable Liquid Multi Purpose Sign
Danger flammable liquid multi purpose sign designed to warn of flammable liquid hazards and prohibit smoking or naked lights in hazardous areas.
• Helps alert individuals to flammable liquid risks and associated ignition hazards
• Suitable for chemical storage areas, workshops, industrial sites, and hazardous workplaces
• High-visibility warning colours and prohibition symbols ensure strong readability and quick recognition
• Manufactured from Aluminium Composite (3mm), Rigid Plastic (1mm), Rigid Plastic (2mm), and Self Adhesive Vinyl
• Supports fire safety awareness and helps reduce the risk of fire and explosion incidents
Danger Highly Flammable Multi Purpose Sign
Danger highly flammable multi purpose sign designed to warn of flammable hazards and prohibit smoking or naked lights in hazardous areas.
• Helps alert individuals to highly flammable substances and associated ignition risks
• Suitable for storage areas, industrial facilities, workshops, and hazardous workplaces
• High-visibility warning colours and prohibition symbols ensure strong readability and quick recognition
• Manufactured from Aluminium Composite (3mm), Rigid Plastic (1mm), Rigid Plastic (2mm), and Self Adhesive Vinyl
• Supports fire safety awareness and helps reduce the risk of fire and explosion incidents
Warning Flammable Gas Sign
Warns of flammable gas hazards to reduce the risk of fire and explosion.
• Alerts people to the presence of flammable gas in the area
• Suitable for industrial sites, storage areas, and gas handling locations
• High-visibility yellow and black design ensures clear recognition
• Available in durable materials for long-lasting performance
• Helps improve safety awareness and prevent ignition risks
Warning Flammable Liquid Sign
Warns of flammable liquid hazards to reduce the risk of fire and explosion.
• Alerts people to the presence of flammable liquids
• Suitable for workplaces, storage areas, and industrial environments
• High-visibility yellow and black design ensures clear recognition
• Available in durable materials for long-lasting performance
• Helps improve safety awareness and prevent ignition risks
Danger Explosive Warning Sign
Danger Explosive Warning Sign clearly warns people of explosive hazards and helps reduce the risk of serious injury or damage.
• Alerts people to the presence of explosive materials or environments
• Suitable for industrial sites, chemical plants and hazardous areas
• High-visibility yellow and black design provides clear hazard 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 awareness of explosive hazards in designated areas
Danger Explosive Atmosphere Warning Sign
Danger Explosive Atmosphere Warning Sign clearly warns people of potentially explosive atmospheres and helps reinforce hazard awareness.
• Alerts people to the presence of a potentially explosive atmosphere
• Suitable for industrial sites, chemical plants and hazardous zones
• High-visibility yellow and black design provides clear hazard 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 awareness of explosive atmosphere hazards in designated areas
Danger Compressed Gas Warning Sign
Danger Compressed Gas Warning Sign clearly warns people of compressed gas hazards and helps reduce the risk of injury or explosion.
• Alerts people to the presence of compressed gas cylinders
• Suitable for industrial sites, workshops and storage areas
• High-visibility yellow and black design provides clear hazard 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 compressed gas hazard awareness in designated areas
Danger Highly Flammable Sign
Danger Highly Flammable Sign clearly warns people of highly flammable substances and helps reinforce awareness of fire and explosion risks.
• Alerts people to the presence of highly flammable materials
• Suitable for industrial sites, storage areas and hazardous workplaces
• High-visibility yellow and black design provides clear hazard 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 fire and flammability hazard awareness in designated areas
Explosive Label Sticker
Indicates explosive hazards using a recognised GHS symbol for clear identification.
• Alerts people to the presence of explosive substances or materials
• Suitable for containers, packaging, and workplace environments
• High-contrast red, white, and black design ensures strong visibility
• Self adhesive vinyl provides easy application and durability
• Supports safe handling and compliance with hazard labelling standards
Highly Flammable Label Sticker
Indicates highly flammable substances using a recognised hazard label for clear identification.
• Alerts people to the presence of highly flammable materials
• Suitable for containers, packaging, and workplace environments
• High-contrast red, white, and black design ensures strong visibility
• Self Adhesive Vinyl provides easy application and durability
• Supports safe handling and compliance with hazard labelling standards
Compressed Gas Label Sticker
Indicates compressed gas hazards using a recognised symbol for clear identification.
• Alerts people to the presence of compressed gas cylinders
• Suitable for containers, packaging, and workplace environments
• High-contrast red, white, and black design ensures strong visibility
• Self Adhesive Vinyl provides easy application and durability
• Supports safe handling and compliance with hazard labelling standards
Danger Explosive Atmosphere Sign - EX Atex Category 1
Warn staff and visitors of explosive atmosphere hazards in ATEX Category 1 areas with this highly visible danger safety sign.
• Alerts individuals to the presence of a potentially explosive atmosphere
• Ideal for hazardous zones, industrial sites, refineries and chemical plants
• 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 improve awareness of explosive atmosphere risks and supports safe working practices
Danger Explosive Atmosphere Sign - EX Atex Category 2
Warn staff and visitors of explosive atmosphere hazards in ATEX Category 2 areas with this highly visible danger safety sign.
• Clearly identifies areas where explosive atmospheres may occur
• Suitable for industrial sites, factories 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 maintain ATEX compliance and improve workplace safety awareness
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
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

Flammable Signs Guide

Flammable Signs are used to warn people about the presence of flammable substances, materials or atmospheres that could ignite if exposed to heat, sparks, flames or other ignition sources. They help improve awareness and encourage safe working practices around fire risks.

These signs form an important part of workplace safety management and are commonly installed where fuels, solvents, chemicals, aerosols, gases or combustible materials are stored, handled or transported.

Where Are Flammable Signs Used?

  • Fuel storage areas
  • Chemical stores and COSHH cabinets
  • Factories and production areas
  • Warehouses and distribution centres
  • Workshops and maintenance rooms
  • Laboratories and science departments
  • Construction sites
  • External storage compounds

Available Materials

Self-Adhesive Vinyl

Ideal for smooth internal surfaces, cabinets, containers and equipment.

Rigid Plastic

Durable and suitable for most workplace environments.

Frequently Asked Questions


What are flammable signs?

Flammable signs warn people that flammable materials, liquids, gases or substances are present and that ignition sources should be controlled.


Where should flammable signs be displayed?

They should be displayed near fuel stores, chemical cabinets, workshops, laboratories, plant rooms and any area where flammable substances are stored or used.


What colour are flammable warning signs?

Flammable warning signs usually use a yellow background with a black flame symbol and black text to indicate a hazard.


Are flammable signs required in workplaces?

Flammable hazards should be clearly identified where there is a risk of fire or ignition and signage is needed to communicate the danger.


Can flammable signs be used outdoors?

Yes. Aluminium and rigid plastic signs are suitable for many outdoor locations where weather resistance is required.


What materials can flammable signs identify?

They can identify flammable liquids, gases, fuels, solvents, aerosols, chemicals and combustible substances.


Do flammable signs help with COSHH safety?

Yes. Flammable signs support COSHH safety by helping identify hazardous substances and reminding people to follow safe handling procedures.


Do you offer custom flammable signs?

Yes. Rainbow Safety can manufacture bespoke flammable signs with custom wording, symbols and site-specific instructions.

Why Buy From Rainbow Safety?

  • Manufactured in the UK
  • Over 30 years of safety signage expertise
  • Fast dispatch on standard products
  • Trade discounts available
  • Custom signage manufactured to order
  • Large range of workplace safety signs
  • Trusted by UK businesses, schools, contractors and local authorities
  • Expert support from an experienced safety signage team