The IMO “Watertight Door – Keep Closed” safety sign is a mandatory marine safety marking used to clearly indicate watertight doors that must remain closed to maintain vessel integrity and compartmentalisation. Proper identification of these doors is critical for flood prevention, damage control, and compliance with marine safety regulations.
Manufactured from high-performance photoluminescent vinyl, the sign remains clearly visible in low-light, blackout, and emergency conditions, absorbing ambient light and emitting a bright after-glow when normal lighting fails. The self-adhesive backing allows fast, secure installation on clean, smooth surfaces without drilling or mechanical fixings.
Designed in accordance with IMO and SOLAS safety signage requirements, this sign is suitable for use on commercial vessels, offshore platforms, FPSOs, OSVs, ferries, and marine facilities.
Key Features
IMO-compliant safety sign – Watertight Door Keep Closed
Photoluminescent material for visibility during power loss and emergencies
Self-adhesive vinyl backing for quick, tool-free installation
High-contrast green and white design for immediate recognition
Durable, marine-grade construction
Resistant to moisture, UV exposure, and general shipboard wear
