Flammable Signs show the W021 flame hazard symbol to warn you, your staff and visitors that flammable materials are present. They are used on cupboards, doors, cabinets, stores and work areas where clear early warning helps prevent ignition risks.

Where Flammable Signs Should Be Positioned

You should install Flammable Signs directly at the point of risk, such as chemical cupboards, flammable storage cabinets, workshop doors, maintenance stores and handling areas. Place them at eye level where someone must see the hazard before opening, entering or working nearby.

Viewing Distance Guidance for 150 x 150 mm Signs

A 150 x 150 mm flammable symbol works best for close-range decisions, especially on doors, cupboards and cabinets. Use it where people approach within a few metres, not as a long-range yard or roadside warning.

Sign size	Practical viewing range	Best use
150 x 150 mm	Up to around 3–5 metres	Cupboards, doors, cabinets, internal stores
Larger format	5 metres plus	Open yards, distant approaches, larger entrances

What Improves Once This Flammable Sign Is Displayed

Once fitted in the right place, this sign helps people recognise a fire risk before they handle materials, open storage or bring ignition sources nearby. It supports quicker decisions, clearer supervision and safer day-to-day routines.

✅ Staff identify flammable storage before working near it

✅ Visitors and contractors get a clear visual warning

✅ Supervisors reduce reliance on verbal reminders

Flammable W021 Sign Technical Details

Sign Message: "Flammable"
Sign type: hazard warning
EN ISO 7010 code: W021
Conforms to EN ISO 7010
Conforms to BS 5499 sign regulations
Purpose: warns of highly flammable materials
Shape: square
Size: H 150 x W 150 mm

Background colour: yellow
Text colour: black
Symbols colour: black
Pictogram: black flame inside yellow warning triangle
Materials: rigid plastic or self-adhesive vinyl
Finish: glossy film surface
Non-photoluminescent
Non-reflective

Orientation: portrait
Supplied as: single sign
Material thickness: various
Display area: indoors or outdoors
Fitting: wall, door, cupboard or cabinet mount
Rigid plastic fixings: available separately
Vinyl fixing: self-adhesive backing

ⓘ Installation Guidance

Practical Fitting Advice for Flammable Hazard Points

❌ Placement errors that weaken the warning

❌ Fitting the sign beside the cupboard instead of on the access face

❌ Placing it too low where stored stock or trolleys hide it

❌ Using one small sign to cover several separate risk points

❌ Situations where this sign alone is not enough

❌ Open yards where people view the hazard from long distances

❌ Areas needing no smoking or no naked flame instructions too

❌ Damaged, dirty or uneven surfaces where vinyl may not bond well

✅ Better fitting choices for reliable warning

✅ Fit at eye level on the door, cabinet or cupboard being accessed

✅ Use rigid plastic when the surface needs separate mechanical fixing

✅ Repeat signs where people approach the hazard from more than one side

? Customers Questions

Flammable Signs questions answered

What are Flammable Signs used for? They warn people that flammable materials are present, helping them take extra care before opening storage, handling substances or working nearby.

Is W021 the correct symbol for flammable materials? Yes. W021 is the EN ISO 7010 warning symbol for flammable material, shown as a black flame inside a yellow warning triangle.

Should I choose rigid plastic or self-adhesive vinyl? Choose vinyl for smooth doors, cupboards and cabinets. Choose rigid plastic where you need a stronger sign fitted to walls, posts or rougher surfaces.

Where should a 150 x 150 mm flammable sign be used? It is best for close-range hazard points such as storage cupboards, internal doors, flammable cabinets, maintenance stores and workshop shelves.

Is this suitable as the only warning for a large flammable store? Not usually. For larger stores or external approaches, you may need larger signs, repeated positions or extra prohibition messages such as no smoking or no naked flames.

✔ Features & Benefits

Flammable Signs Features and Practical Benefits

Features

✓ W021 flame symbol for recognised hazard communication
✓ Compact 150 x 150 mm format for close-risk locations
✓ Yellow and black contrast for fast visual recognition
✓ Choice of rigid plastic or self-adhesive vinyl

Benefits

✓ Helps you warn people before they enter or open storage
✓ Reduces confusion around flammable cupboards and cabinets
✓ Supports consistent safety control across small hazard points
✓ Lets you choose a fixing type suited to the surface

Compare Flammable Labels With Stronger Warnings

For symbol-first recognition, use flammable symbol hazard signs where people need to identify fire risk quickly. Good for doors, cabinets and material storage.

Where smoking and naked flames must be stopped, choose no smoking no naked lights flammable signs for firmer instruction. Useful near fuels, aerosols and solvent stores.

For high-visibility fire-risk marking, consider flammable hazard warning signs in areas with combustible products. Practical for warehouses, plant rooms and workshops.

If one compact sign is needed, compare flammable no naked lights warning sign for smaller risk points. Helpful on cabinets, doors and restricted access points.

For more related fire and substance warnings, browse flammable and chemical safety signs before choosing. Useful when your site needs consistent hazard messaging.

🚚 Delivery

Estimated Delivery Day

Current date and time:

Estimated delivery by:

Based on an estimated 3 working day delivery timeframe from today, excluding weekends and bank holidays. Delivery dates are provided as a guide only and may vary depending on the product ordered, stock availability at the time of purchase, production or printing lead times.