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
Warns that a highly flammable store is present and highlights serious fire risk.
• Alerts people to the presence of a highly flammable storage area
• Suitable for warehouses, storage rooms, and industrial sites
• High-visibility yellow and black design ensures clear recognition
• Available in durable materials for long-lasting use
• Helps prevent fire hazards and improves workplace safety awareness
Flammable Symbol Sign
Warns of flammable substances using a clear and recognisable hazard symbol.
• Alerts people to the presence of flammable materials
• Suitable for workplaces, storage areas, and industrial environments
• Bold yellow and black design ensures high visibility
• Available in durable materials for long-lasting use
• Helps reduce fire risks and improve safety awareness
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
Warns of explosive hazards to 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 ensures clear recognition
• Available in durable materials for long-lasting performance
• Helps improve safety awareness and prevent dangerous incidents
Danger Explosive Atmosphere Warning Sign
Warns of explosive atmosphere hazards to reduce the risk of serious incidents.
• Alerts people to the presence of potentially explosive atmospheres
• Suitable for industrial sites, chemical plants, and hazardous zones
• High-visibility yellow and black design ensures clear recognition
• Available in durable materials for long-lasting performance
• Helps improve safety awareness and prevent dangerous situations
Danger Compressed Gas Warning Sign
Warns of compressed gas hazards to 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 ensures clear recognition
• Available in durable materials for long-lasting performance
• Helps improve safety awareness and prevent hazardous incidents
Danger Highly Flammable Sign
Warns of highly flammable substances to reduce 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 ensures clear recognition
• Available in durable materials for long-lasting performance
• Helps improve safety awareness and prevent dangerous incidents
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
Warns of explosive atmosphere risk in ATEX Zone 1 areas to prevent ignition and serious injury
• Alerts individuals to the presence of a potentially explosive atmosphere
• Ideal for hazardous zones, industrial sites, refineries, and chemical plants
• High-contrast design with clear EX symbol and bold text for maximum visibility
• Manufactured from durable materials suitable for demanding environments
• Helps ensure compliance and improves overall site safety awareness
Danger Explosive Atmosphere Sign - EX Atex Category 2
Warns of an explosive atmosphere in ATEX Zone 2 areas to reduce ignition risks and improve safety awareness.
• Clearly identifies areas where explosive atmospheres may occur
• Suitable for industrial sites, factories, and hazardous zones
• High-contrast yellow and black design ensures strong visibility
• Manufactured using durable, long-lasting materials
• Helps maintain ATEX compliance and protect personnel
Danger Explosive Atmosphere Sign - EX Atex Category 3
Warns of the presence of a potentially explosive atmosphere in designated areas.
• Alerts personnel to explosive atmosphere hazards
• Suitable for industrial sites, refineries, and hazardous zones
• High-contrast design ensures clear visibility
• Available in multiple durable material options
• Helps reduce risk and improve workplace safety compliance

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