Dangerous When Wet - Safety Signs by Caledonia Signs

Warn about chemicals or substances that react violently with water, often producing flammable gases or heat that can cause fires or explosions. These materials pose a serious hazard if they come into contact with moisture, so the sign alerts workers and emergency responders to take precautions to keep these substances dry and handle them carefully.

You should place this sign in areas where water-reactive chemicals are stored, handled, or transported. Common locations include chemical storage rooms, industrial plants, laboratories, and shipping areas where substances like alkali metals (e.g., sodium or potassium) or certain metal hydrides are kept. The sign helps ensure that people avoid using water-based firefighting methods or accidentally exposing the material to moisture.

The use of the GHS Dangerous When Wet sign is also crucial for regulatory compliance with workplace safety laws and chemical handling standards. Proper labeling helps companies meet legal requirements and supports training and emergency response plans tailored to the unique risks these materials pose.

In short, the GHS Dangerous When Wet sign should be used whenever chemicals that react dangerously with water are present. It provides a clear, immediate warning to promote safe handling, prevent accidents, and ensure appropriate emergency measures are taken in case of spills or fires.

Materials Explained

Below is a more detailed description of the materials this particular safety sign is available in. Helping you decide which sign option is most suitable for your application.

Rigid Plastic: This lightweight, gloss white PVC is resistant to weather, moisture, chemicals, and general wear and tear, making it suitable for harsh environments. Its smooth, solid surface allows for crisp printing of text and graphics, enhancing readability and visual impact. Businesses who choose Rigid Plastic signs benefit from fewer replacements and minimal maintenance, making it a practical investment for reliable and effective safety signs.

Self-Adhesive Vinyl: Self-adhesive vinyl is easy to apply and it’s budget-friendly. Its adhesive backing allows for easy application to a variety of surfaces such as glass, metal, plastic, and painted walls, which simplifies installation and reduces setup time. Self-adhesive vinyl provides a clean, professional finish that suits many indoor environments including offices, retail, industrial sites, and vehicles. It is more affordable than many other material types and allows for custom shapes, colours, and graphics.