Best 24 Inch Industrial Warning Signs of 2026

Brian Howie Avatar
Brian Howie
Last Updated: Jan 20, 2026

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These 24 inch industrial warning signs are a must-have for any workplace or facility that prioritizes safety. Made from durable materials, these signs are designed to withstand harsh environments and remain visible even from a distance. The bright, bold lettering and graphics make it easy to communicate important safety messages, such as warnings about hazardous materials, restricted areas, or potential dangers. Whether you need to warn employees, visitors, or customers, these industrial warning signs are an effective way to prevent accidents and ensure compliance with safety regulations.

At a Glance: Our Top Picks

SmartSign Aluminum Automatic Gate Caution Sign Cover #TOP 1
SmartSign Aluminum Automatic Gate Caution Sign
ftb score rating icon 9.8
SIMPLI-MAGIC 24" Wet Floor Caution Signs 6 Pack Cover #TOP 2
SIMPLI-MAGIC 24" Wet Floor Caution Signs 6 Pack
ftb score rating icon 9.7
SmartSign Aluminum Dumpster Rules Sign 24x24 Cover #TOP 3
SmartSign Aluminum Dumpster Rules Sign 24x24
ftb score rating icon 9.5

Top 10 24 Inch Industrial Warning Signs

#TOP 1

SmartSign Aluminum Automatic Gate Caution Sign

K-1037-AL-24x24
24" x 24"
SmartSign Aluminum Automatic Gate Caution Sign Cover
SmartSign "Caution! Automatic Gates - Gate Timed for One Vehicle, No Playing Or Climbing On Or Around Gate" Sign | 24" x 24" Aluminum, Made in USA

The SmartSign Automatic Gate Sign is built to last with its sturdy 80 mil thick aluminum construction, ensuring it won't easily bend or get damaged. This means you can rely on it through harsh weather conditions for up to 10 years. Its rounded, burr-free corners make it safe and easy to handle, while also giving it a polished, professional look. The sign is laminated, which protects the graphics from weather damage and makes it easy to clean off graffiti. Plus, it comes with pre-drilled holes, so you can quickly and easily install it on various types of posts or fences without hassle.

What We Like
Durable aluminum material
Rounded, safe corners
Laminated for weather protection
Pre-drilled mounting holes
#TOP 2

SIMPLI-MAGIC 24" Wet Floor Caution Signs 6 Pack

79628
24 x 36
SIMPLI-MAGIC 24" Wet Floor Caution Signs 6 Pack Cover
SIMPLI-MAGIC 24" Height Wet Floor Caution Signs, 6 Pack – Double-Sided, Bilingual & Foldable Safety Warning Sign – Commercial Grade, Yellow

The SIMPLI-MAGIC Wet Floor Signs come in a pack of six bright yellow signs that are easy to spot from a distance, making them perfect for marking wet or slippery areas like floors, doorways, and walkways. You can place multiple signs as needed to keep everyone informed and safe. These signs help you alert customers, employees, and pedestrians about spills or leaks, reducing the risk of accidents. They fold down and have a built-in handle, so you can easily carry and store them when not in use. Plus, the signs display warnings in both English and Spanish, ensuring clear communication for a wider audience.

What We Like
Highly visible design
Set of six signs
Foldable with handle
Bilingual warnings
#TOP 3

SmartSign Aluminum Dumpster Rules Sign 24x24

K-2287-AL-24x24
Black/Red on White
24" x 24"
SmartSign Aluminum Dumpster Rules Sign 24x24 Cover
SmartSign "Dumpster Rules - Residents Only, Securely Bag, No Parking" Sign | 24" x 24" Aluminum

The SmartSign Dumpster Rules Sign is built with thick aluminum that resists bending and can withstand harsh weather, so you can rely on it to last for years. Its rounded, smooth corners make handling safer and give it a neat, professional look. The sign is laminated, which means its graphics stay protected from rain, sun, and even graffiti, making cleaning easy and keeping the sign clear and readable. Installation is simple thanks to pre-drilled holes, allowing you to mount it on various post types or fences without hassle. This sign offers durability and convenience for anyone needing clear dumpster rules.

What We Like
Durable aluminum material
Safe rounded corners
Weather-resistant lamination
Easy installation holes
#TOP 4

SmartSign 18x24 Restricted Area Metal Sign

H3L1
Red, White, Black
18" x 24"
SmartSign 18x24 Restricted Area Metal Sign Cover
SmartSign 18" x 24" 'Restricted Area Do Not Enter, Authorized Personnel Only' Metal Sign with Symbol, 80 mil Aluminum, 3M Laminated Engineer Grade Reflective, Red, White and Black, USA-Made

The SmartSign Restricted Area Sign is made from thick, rust-resistant aluminum, ensuring it stays durable and visible for up to 10 years outdoors. This means you don’t have to worry about frequent replacements. Installing the sign is simple because it comes with smooth, rounded corners and pre-drilled holes that fit a variety of posts and fences, saving you time and effort. The sign’s laminated surface protects the graphics from weather damage and allows you to clean off graffiti easily, keeping it clear and professional-looking. Plus, it uses official 3M reflective materials and inks, which means it stays bright and easy to read, even in low light conditions.

What We Like
Durable rustproof aluminum
Easy installation with pre-drilled holes
Weather and graffiti resistant lamination
High-quality 3M reflective materials
#TOP 5

SmartSign Dock 4 Reflective Aluminum Sign

K-6982-4-EG-18x24
Blue on White
18" x 24"
SmartSign Dock 4 Reflective Aluminum Sign Cover
SmartSign "Dock 4" Dock Number Sign | 18" x 24" 3M Engineer Grade Reflective Aluminum

The SmartSign Dock Number Sign is built with heavy-duty aluminum that won’t rust and is designed to last up to 10 years outdoors, making it a reliable choice for your docking area. Installation is simple since the sign comes with pre-drilled holes and rounded corners, allowing you to easily mount it on various types of posts or fences. The sign features official 3M reflective film and inks, ensuring high visibility and durability for outdoor use. Plus, its laminated surface protects the graphics from weather damage and graffiti, so your sign stays clear and readable over time.

What We Like
Durable rustproof aluminum
Easy installation with pre-drilled holes
High-visibility 3M reflective film
Weather and graffiti resistant lamination

Paper Street Plastics Leaf Sign Vinyl 24"x10'

Silver
24 inch x 10 feet
Paper Street Plastics Leaf Sign Vinyl 24"x10' Cover
Leaf Sign Vinyl, Adhesive Coated (24 inch x 10 feet, Silver)

The Paper Street Vinyl Sign offers a convenient adhesive backing that lets you easily peel and stick the vinyl where you need it, saving time during application. Its 3 mil thickness ensures a high-quality vinyl material that works great with automatic cutters like Stikas and Rolands, making your cutting and weeding tasks smooth and efficient. Designed for durability, this vinyl can withstand outdoor conditions for up to five years, keeping your signs looking fresh longer. Plus, it's waterproof, so you don’t have to worry about damage from rain or moisture. This product is a reliable choice for creating durable, easy-to-apply signs.

What We Like
Easy peel-and-stick adhesive
Compatible with automatic cutters
Up to 5 years outdoor durability
Waterproof material
#TOP 7

SmartSign No Parking Tow Away Aluminum Sign

HNXL
ACM EG Reflective
18" x 24"
SmartSign No Parking Tow Away Aluminum Sign Cover
SmartSign "No Parking - Violators Will Be Towed Away at Vehicle Owner's Expense" Sign - 18" x 24", 120 mil Aluminum Composite (ACM) with Overcoat, Engineer Grade Reflective, Red and White, Made in USA

The SmartSign No Parking Sign is a durable warning sign designed to last up to seven years outdoors, thanks to its sturdy aluminum composite material. This means you won’t need to replace it often, saving you time and money. Installation is simple with pre-drilled holes and rounded corners, allowing you to mount it on various posts or fences without hassle. The sign is also highly reflective, making sure it’s visible at night so drivers can’t claim they didn’t see it. Plus, a clear UV coating protects against weather, chemicals, and graffiti, keeping the sign looking good and effective for years.

What We Like
Long-lasting durability
Easy installation
High nighttime visibility
UV and graffiti resistant
#TOP 8

T&R Large Exit Sign with Left Arrow, 24x24 inches

T&R
EXL24
T&R Large Exit Sign with Left Arrow, 24x24 inches Cover
T&R Large Exit Sign with Left Arrow 24 x 24 Inches, Engineer Grade Reflective Sheeting, Rust Free Aluminum, Weather Resistant, Waterproof, Fade Resistant, 2 Pre-drilled Holes

The T&R Exit Sign Left Arrow is a durable and easy-to-install safety sign designed for clear visibility. Made from heavy-duty rust-free aluminum, it ensures long-lasting use without corrosion, perfect for outdoor environments. The sign measures 24 by 24 inches, providing a large and easy-to-see display that helps guide people efficiently. Installation is simple thanks to two pre-drilled holes at the top and bottom, so you can quickly mount it wherever needed. Built to resist weather, water, and fading, this sign maintains its bright, reflective quality for up to 10 years, making it a reliable choice for safety and direction.

What We Like
Heavy-duty rust-free aluminum
Large 24x24 inch size
Easy installation with pre-drilled holes
Weatherproof and fade resistant
#TOP 9

Tandefio Stainless Steel Foldable Watch Your Step Signs (2 pcs)

CLO-Tandefio-647
silver and red
Tandefio Stainless Steel Foldable Watch Your Step Signs (2 pcs) Cover
Tandefio 2 Pcs Stainless Steel Caution Watch Your Step Signs 24 Inch Foldable Wet Floor Sign Double Sided Commercial Safety Warning Industrial Warning Mark for Office Hotel Market Restroom Restaurant

The Tandefio Foldable Step Signs come in a convenient pack of two, each measuring about 8.6 by 24 inches when folded, making them easy to store and ideal for use in various places like stairs or wet floors. Made of durable stainless steel, these signs resist corrosion and fading, so you can rely on them even in harsh weather. Their sturdy build keeps them stable, so they won’t tip over easily in the wind. The double-sided reflective printing ensures the warning is visible from a distance, day or night, helping you keep areas safe. Plus, the foldable design with a handy handle makes them simple to carry and store when not in use, perfect for cleaning crews on the go.

What We Like
Durable stainless steel
Compact foldable design
Double-sided reflective print
Easy to carry and store
#TOP 10

T&R Exit Sign with Up Arrow 24x24

T&R
EXS24
T&R Exit Sign with Up Arrow 24x24 Cover
T&R Large Exit Sign with Up Arrow 24 x 24 Inches, Engineer Grade Reflective Sheeting, Rust Free Aluminum, Weather Resistant, Waterproof, Fade Resistant, 2 Pre-drilled Holes

The T&R Exit Up Arrow Sign is a large, durable exit sign measuring 24 by 24 inches, made from heavy-duty rust-free aluminum to ensure long-lasting use. It comes with two pre-drilled holes, making it easy for you to install it quickly without extra hassle. This sign is designed to withstand harsh weather conditions, as it is waterproof, corrosion-resistant, and UV protected, so it won’t fade or get damaged over time. The bold, reflective lettering is easy to read from a distance, helping you clearly mark exits even in low light or at night when illuminated by headlights or other light sources.

What We Like
Heavy-duty rust-free aluminum
Easy installation with pre-drilled holes
Waterproof and weather resistant
UV protected, fade resistant
Highly visible reflective lettering
Buying Guide Image
Editor's Notes

During our 24 inch industrial warning sign research, we found 24 24 inch industrial warning sign products and shortlisted 10 quality products. We collected and analyzed 9,637 customer reviews through our big data system to write the 24 inch industrial warning signs list. We found that most customers choose 24 inch industrial warning signs with an average price of $49.82.

The 24 inch industrial warning signs are available for purchase. We have researched hundreds of brands and picked the top brands of 24 inch industrial warning signs, including SmartSign, SIMPLI-MAGIC, Paper Street Plastics, T&R, Tandefio. The seller of top 1 product has received honest feedback from 1,198 consumers with an average rating of 4.8.

Written by
Brian Howie Avatar

Brian Howie is a content writer and senior industrial designer. After graduation from Westminster College, he has been engaged in product design and manufacturing for 18 years. Brian Howie has always found great pleasure in designing industrial products and sharing his ideas and experience online.