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.

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There are 21 products.

LPG Highly Flammable Sign

Clearly warns people that highly flammable LPG is present to help reduce fire risks and improve safety awareness.
• Alerts people to the presence of highly flammable LPG
• Suitable for industrial sites, storage areas and fuel handling zones
• 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 reinforce fire hazard awareness around areas containing LPG

£2.71

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

£2.71

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

£2.71

Warning Fire Risk Flammable Sign

Clearly warns people of a fire risk from flammable materials to help promote safer working conditions.
• Alerts people to the presence of flammable materials and associated fire hazards
• Suitable for workplaces, storage areas and industrial environments
• 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 fire risk awareness and encourage appropriate caution in hazardous areas

£2.71

Highly Flammable LPG No Smoking No Naked Lights Sign with warning and prohibition symbols

Highly Flammable LPG Multi Purpose Sign

Clearly warns people of highly flammable LPG while prohibiting smoking and naked lights to help reduce fire and ignition risks.
• Warns of highly flammable LPG and prohibits smoking and naked lights
• Suitable for gas storage areas, fuel handling zones, industrial sites and workshops
• High-visibility colours and clear warning and prohibition symbols provide quick recognition
• Available in Aluminium Composite (3mm), Rigid Plastic (1mm), Rigid Plastic 1mm (Self Adhesive Back), Rigid Plastic (2mm), Rigid Plastic 2mm (Self Adhesive Back) and Self Adhesive Vinyl
• Helps improve fire safety awareness and reduce the risk of ignition around flammable LPG

£6.86

Petroleum Spirit Highly Flammable No Smoking No Naked Lights Sign with warning and prohibition symbols

Petroleum Spirit Highly Flammable Multi Purpose Sign

Clearly warns people of highly flammable petroleum spirit while prohibiting smoking and naked lights to help reduce fire and ignition risks.
• Warns of highly flammable petroleum spirit and prohibits smoking and naked lights
• Suitable for fuel storage areas, workshops, industrial sites and hazardous material zones
• High-visibility colours and clear warning and prohibition symbols provide quick recognition
• Available in Aluminium Composite (3mm), Rigid Plastic (1mm), Rigid Plastic 1mm (Self Adhesive Back), Rigid Plastic (2mm), Rigid Plastic 2mm (Self Adhesive Back) and Self Adhesive Vinyl
• Helps improve fire safety awareness and reduce the risk of fire and explosion incidents

£6.86

Danger Flammable Liquid No Smoking No Naked Lights Sign with warning and prohibition symbols

Danger Flammable Liquid Multi Purpose Sign

Clearly warns people of flammable liquid hazards while prohibiting smoking and naked lights to help reduce fire and ignition risks.
• Warns of flammable liquid hazards and prohibits smoking and naked lights
• Suitable for chemical storage areas, workshops, industrial sites and hazardous workplaces
• High-visibility warning colours and clear prohibition symbols provide quick recognition
• Available in Aluminium Composite (3mm), Rigid Plastic (1mm), Rigid Plastic 1mm (Self Adhesive Back), Rigid Plastic (2mm), Rigid Plastic 2mm (Self Adhesive Back) and Self Adhesive Vinyl
• Helps improve fire safety awareness and reduce the risk of fire and explosion incidents

£6.86

Danger Highly Flammable No Smoking No Naked Lights Sign with warning and prohibition symbols

Danger Highly Flammable Multi Purpose Sign

Clearly warns people of highly flammable hazards while prohibiting smoking and naked lights to help reduce fire and ignition risks.
• Warns of highly flammable substances and prohibits smoking and naked lights
• Suitable for storage areas, industrial facilities, workshops and hazardous workplaces
• High-visibility warning colours and clear prohibition symbols provide quick recognition
• Available in Aluminium Composite (3mm), Rigid Plastic (1mm), Rigid Plastic 1mm (Self Adhesive Back), Rigid Plastic (2mm), Rigid Plastic 2mm (Self Adhesive Back) and Self Adhesive Vinyl
• Helps improve fire safety awareness and reduce the risk of fire and explosion incidents

£6.86

Warning Flammable Gas Sign

Clearly warns people of flammable gas hazards to help reduce the risk of fire, ignition and explosion.
• Alerts people to the presence of flammable gas and associated hazards
• Suitable for industrial sites, storage areas and gas handling locations
• 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 flammable gas awareness and encourage appropriate caution in hazardous areas

£2.71

Warning Flammable Liquid Sign

Clearly warns people of flammable liquid hazards to help reduce the risk of fire, ignition and explosion.
• Alerts people to the presence of flammable liquids and associated hazards
• Suitable for workplaces, storage areas and industrial environments
• 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 flammable liquid awareness and encourage appropriate caution in hazardous areas

£2.71

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

£2.71

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

£2.71

Showing 1-12 of 21 item(s)

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

Types Of Flammable Signs

Available Materials

Self-Adhesive Vinyl

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

Rigid Plastic

Durable and suitable for most workplace environments.

Related Hazard Warning Sign Categories

Safety Advice & Guides

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