Danger OSHA Sign: No Smoking, No Open Flames, No Sparks — Clear Hazard Communication for Fire-Risk Zones
The Danger No Smoking, No Open Flames, No Sparks OSHA sign is a compliant safety sign designed to communicate critical fire and ignition hazards in construction, industrial, and commercial environments. Printed in high-visibility black and red on a horizontal format, it delivers an unambiguous warning wherever flammable materials, gases, or vapors are present. This sign is suited for contractors, site supervisors, and safety officers who need durable, code-aligned hazard signage across a range of jobsite conditions. It is available in multiple sizes and substrate materials to match indoor, outdoor, permanent, or temporary installation requirements.
Technical Specifications
| Specification | Details |
|---|---|
| Part Number | LS-12384 |
| Manufacturer Part Number | LCU4-0541-NA_10x7 |
| Size Code | LS-AL-10 |
| Colors | Black and Red |
| Shape | Horizontal |
| Available Sizes | 3.5" x 5", 5" x 7", 7" x 10", 10" x 14" |
| Available Materials | 3M Engineer Grade Labels, Laminated Plastic Labels, 3M Vinyl Labels, 3M Engineer Grade Aluminum, Plastic, Aluminum (40 mil) |
Unlike generic printed signs, this sign is offered in a range of professional-grade substrates — including 3M Engineer Grade Aluminum and heavy 40 mil aluminum — providing options for both temporary label applications and long-term permanent installations. The variety of sizes from 3.5" x 5" up to 10" x 14" allows contractors to match signage to the viewing distance and mounting location required by the specific hazard zone.
Key Features & Benefits
Multiple Substrate Options
Available in 3M Engineer Grade Labels, Laminated Plastic Labels, 3M Vinyl Labels, 3M Engineer Grade Aluminum, Plastic, and 40 mil Aluminum, this sign can be specified for virtually any installation condition. Contractors can select a lightweight label for equipment surfaces or a rigid aluminum sign for permanent wall or post mounting.
Range of Sizes
Four size options — 3.5" x 5", 5" x 7", 7" x 10", and 10" x 14" — allow the sign to be matched to the required visibility distance and mounting location. Larger formats are appropriate for wide-area warnings, while smaller formats suit equipment panels or confined spaces.
High-Contrast Black and Red Color Scheme
The black and red color combination on a horizontal layout follows standard Danger-level hazard communication conventions, making the warning immediately recognizable to workers on site. High contrast improves legibility under variable lighting conditions common on active construction sites.
Horizontal Format
The horizontal orientation is well-suited for standard wall mounting, door placement, and equipment panels where vertical space may be limited. It integrates cleanly into typical safety signage layouts without requiring custom mounting hardware.
Common Applications
Flammable Storage Areas
Post at entrances to rooms or enclosures where flammable liquids, gases, or materials are stored to warn workers against introducing ignition sources.
Fuel Handling Zones
Install near fuel dispensing equipment, generators, or propane storage on construction sites where open flames or sparks present an immediate fire risk.
Welding and Hot Work Exclusion Boundaries
Use to mark perimeters adjacent to areas where hot work permits are in effect, reinforcing restrictions on smoking and open flames in the surrounding zone.
Industrial Facilities and Warehouses
Suitable for permanent installation in manufacturing or warehouse environments where flammable vapors or combustible dust may be present.
Equipment Panels and Machinery
Smaller label formats (3.5" x 5" or 5" x 7") can be applied directly to equipment surfaces to provide point-of-use hazard warnings.
Compatible Materials
- Interior and exterior walls (rigid aluminum or plastic substrates)
- Equipment panels and machinery surfaces (label and vinyl substrates)
- Doors and partitions (label, laminated plastic, or rigid formats)
- Posts and fencing (aluminum substrates with standard hardware)
- Smooth flat surfaces (3M Vinyl and Engineer Grade Label formats)