Best 18 Inch Industrial Warning Signs of 2025

The MECCANIXITY Stop Sign is an essential tool for enhancing road safety. Measuring 18 inches by 18 inches, this octagonal sign is made from reflective materials, ensuring it remains visible to drivers even at night. The bright red and white colors effectively catch attention, making it a reliable warning in various locations like parking lots and office buildings. Its sturdy aluminum construction is waterproof, rust-resistant, and built to last, meeting traffic standards for optimal safety. Installation is straightforward, thanks to pre-drilled holes that allow for easy mounting with common tools.

Introducing the Bolthead Handicap Parking Sign, the perfect solution for clearly marking reserved parking spaces. Made by Bolthead Industrial, this 18" x 12" aluminum safety warning sign is designed to catch attention with its blue and green paint on a white background. The recognizable iconography ensures that the message of reserved parking is understood at a glance. But it's not just about looks, this sign is built to last. With its heavy-duty 1mm thick aluminum construction, it resists rust and bending, making it resilient for long-term use. The industry-standard UV coating provides weatherproof protection, so it can withstand wind, rain, and sun exposure. And with its premium reflective coating, the message remains legible even at night. With the Bolthead Handicap Parking Sign, you can ensure that reserved parking spaces are clearly marked and easily identifiable, providing convenience and accessibility for those who need it.

The HISVISION Stop Sign features a bold red and white design that is easy to read, ensuring that your warning is clear and noticeable. Made from durable, rust-free aluminum, this sign is built to withstand the elements and can last up to 10 years, making it perfect for both indoor and outdoor use. It is equipped with high-quality reflective material, which enhances visibility at night when illuminated, ensuring that it stands out even in low-light conditions. Additionally, the UV protection layer helps prevent fading, providing a long-lasting solution for your warning needs.

SmartSign Reflective Aluminum Sign is a durable 18" x 18" sign with 3M high-intensity reflective aluminum. The official 3M reflective films and inks ensure DOT compliance for outdoor signs. Rounded corners and rustproof aluminum provide a professional appearance and longer lifespan. The laminated graphics protect from weather and vandalism. Pre-punched mounting holes make installation easy on various surfaces. The stop sign shape enhances visibility and emphasizes the warning message, making it ideal for industrial warning signs.

The SmartSign Overhead Power Lines sign is designed for durability and visibility. Made from heavy-duty aluminum, it resists rust and lasts over ten years outdoors, ensuring long-term safety. The sign features 3M authorized reflective materials that are three times more reflective than standard options, making it easy to see even in low light. Additionally, the laminated surface protects against weather and vandalism, allowing you to clean off graffiti easily. With pre-punched holes and rounded corners, installation is straightforward and safe, whether you’re mounting it on posts or fences.

This Handicap Parking Sign comes in a pack of 3 and is perfect for parking lots, private driveways, and businesses. It features blue and green paint on a white background and recognizable iconography for clear communication. Made of heavy-duty, 1mm thick aluminum, it is rust and bend-resistant. The industry-standard UV coating makes it weatherproof, and the premium reflective coating ensures legibility even at night. With two pre-drilled holes, it can be easily mounted on nearly any surface, including street lamps and walls.

The Brimar Diesel Fuel Sign is made from durable rust-free aluminum, ensuring it stands up to the elements for a long time. It features an NFPA rating of 1-2-0, which helps you quickly understand the flammability and health risks associated with diesel fuel. The sign clearly warns of the dangers of diesel fuel, using bold text and recognized symbols to prohibit smoking and open flames. Additionally, installation is a breeze with pre-drilled holes, allowing you to mount it effortlessly on various surfaces like walls or fences.

The T&R Do Not Enter sign measures 18 x 18 inches and is made from heavy-duty rust-free aluminum, ensuring durability in various weather conditions. With pre-drilled holes in each corner, installation is a breeze, allowing you to easily mount it where needed. This sign is designed to withstand the elements, featuring waterproof and UV-protected materials that prevent fading over time. Its reflective surface ensures that the bold lettering is visible even in low light, making it effective for conveying important messages clearly and safely at night.

The EZ Hook Oversize Sign is designed for durability and visibility. Made from a strong vinyl-coated poly-mesh material, it allows for airflow, preventing damage from wind. Proudly made in the USA, it features a robust construction with a flexible welt and heavy bungee cords on each end, making it easy to secure. The wrap-around double-stitch border adds extra strength to withstand various conditions. With bold 12-inch black letters on a bright yellow background, this sign ensures that your message is clear and easily seen, enhancing safety on the road for both you and other drivers.

The SmartSign Warning Sign is designed for durability and long-lasting use. Made from thick aluminum, this sign can withstand harsh weather conditions, ensuring it remains intact for up to 10 years outdoors. Its laminated surface protects the graphics from wear and tear, making it easy to clean off any graffiti. The rounded corners enhance safety during handling and give the sign a polished look. Installation is a breeze with pre-punched holes, allowing you to mount it easily on various surfaces like posts and fences. This sign effectively communicates that the area is closed off, preventing unauthorized access.