Notice OSHA Sign: Keep This Door Closed

Notice OSHA Sign: Keep This Door Closed — Clear, Durable Door Safety Compliance Signage

The Notice OSHA "Keep This Door Closed" sign is a horizontal-format safety sign designed for contractors, facility managers, and trades professionals who need to maintain door closure compliance in commercial, industrial, and construction environments. Available in multiple sizes and substrate materials, this sign communicates a critical safety directive in high-visibility blue and black coloring consistent with OSHA Notice-level signage standards. It is suitable for permanent installation on doors, walls, and frames where unauthorized or accidental door propping poses a safety or security risk.

Technical Specifications

Unlike generic printed signs, this product is offered in multiple professional-grade substrates — including 3M Engineer Grade materials and heavy 40 mil aluminum — giving contractors the flexibility to select the right durability level for indoor, outdoor, or high-traffic applications. The laminated aluminum option in particular is built to withstand the wear and environmental exposure common on active job sites and in industrial facilities.

Key Features & Benefits

Multiple Substrate Options

Available in 3M Engineer Grade Labels, 3M Engineer Grade Aluminum, Plastic, and 40 mil Aluminum, this sign can be specified to match the demands of the installation environment. Contractors can choose a cost-effective label for interior use or a heavy-duty aluminum version for long-term exterior or high-traffic applications.

40 Mil Aluminum Construction

The 40 mil aluminum substrate provides a rigid, impact-resistant sign that holds up in demanding job site conditions. Lamination adds an additional layer of protection against abrasion, moisture, and UV exposure, extending the service life of the sign.

Prepunched Mounting Holes

Rounded corners and prepunched holes allow for fast, tool-minimal installation using standard screws or nails. This reduces installation time on busy job sites where efficiency matters.

OSHA Notice Color Scheme

The blue and black color combination aligns with OSHA Notice-level signage conventions, ensuring the sign is immediately recognizable to workers and inspectors as an informational safety directive. Consistent color coding supports a compliant, professional safety program.

Three Size Options

Available in 5" x 7", 7" x 10", and 10" x 14" to suit different viewing distances and door or wall configurations. Larger formats are appropriate for high-traffic or wide-aisle areas where visibility at a distance is required.

Common Applications

Fire-Rated Door Compliance

Posted on fire-rated doors to remind occupants and workers that the door must remain closed to maintain fire compartmentalization integrity.

HVAC and Climate-Controlled Areas

Used on doors separating conditioned spaces from unconditioned areas to prevent energy loss and maintain environmental controls.

Restricted Access Zones

Installed on doors leading to mechanical rooms, electrical rooms, or other restricted areas where an open door creates a safety or security hazard.

Construction Site Temporary Enclosures

Applied to temporary barriers and enclosure doors on active construction sites to control dust, debris, and unauthorized access between work zones.

Commercial and Industrial Facilities

Suitable for warehouses, manufacturing plants, and commercial buildings where door closure is required for safety, security, or operational reasons.

Compatible Materials

• Metal doors and door frames (screw or nail mounting)
• Wood doors and frames (screw or nail mounting)
• Smooth wall surfaces (label substrate)
• Painted or primed surfaces (label substrate)
• Concrete or masonry walls (aluminum substrate with appropriate fasteners)