Outdoor signs need to withstand a lot of weather exposure. Snow, ice, sunlight, wind, and changing temperatures can all wear on a sign over time. Rain and moisture can be especially challenging, as water exposure can cause some materials to warp, swell, corrode, or deteriorate.
So, what is the best waterproof material for outdoor signs? Several materials perform well in wet outdoor environments, including aluminum, aluminum composite material (ACM), PVC, and acrylic. The best choice might depend on the type of sign and its specific application.
In this guide, we’ll get into some of the most common materials used for outdoor signs and how they hold up when exposed to water and the elements.
What does waterproof mean?
When a sign material is described as waterproof, it means it can withstand exposure to water without absorbing moisture or suffering water-related damage. This is particularly important for outdoor signs that may be exposed to rain, snow, and humidity.
What is the best waterproof material for outdoor signs?
Aluminum composite material is generally considered one of the best choices for waterproof outdoor signs. Its combination of moisture resistance, durability, lightweight construction, and versatility makes it well suited to many outdoor applications. However, it isn’t the only material that can perform well in wet conditions. Let’s take a closer look at ACM and some other common options:
Aluminum Composite Material (ACM)
ACM is a composite material made of aluminum sheets bonded around a lightweight core that naturally resists corrosion and doesn’t absorb water. It’s one of the best waterproof materials for outdoor signs because its durable, moisture-resistant construction helps prevent warping and fading.
Aluminum
Strong and lightweight, aluminum can also naturally resist corrosion and not absorb water. Its durability makes it ideal for parking signs, street signs and other heavy-duty outdoor applications.
PVC
Known for being lightweight and cost-effective, this plastic is naturally waterproof. That said, prolonged heat and direct sun exposure can cause it to warp over time.
Acrylic
Acrylic is a non-porous plastic that resists rain and UV exposure without rotting or rusting. The glass-like finish makes it popular for sleek, modern signage. That said, it’s more prone to scratches and impact damage than aluminum or ACM.
Is wood signage waterproof?
Wood is not naturally waterproof, and raw wood signage can rot, swell, warp, or mold if left outside without protection. However, wood can be used for outdoor signage if it is properly treated, sealed, and maintained to help protect it from moisture and other elements. Some businesses choose wood for its natural, rustic appearance, which can give a sign a warm, distinctive look. However, wood signs typically require more maintenance than naturally waterproof materials to keep them looking their best and performing well outdoors.
Does waterproof mean weatherproof?
Not necessarily. Waterproof refers specifically to a material’s ability to withstand exposure to water and moisture, while weatherproof is a broader term that refers to a material’s ability to withstand a range of outdoor conditions. A weatherproof sign may need to resist not only rain but also UV exposure, wind, snow, freezing temperatures, and changing weather conditions. For outdoor signage, it’s important to consider both waterproofing and overall weather resistance when choosing a material.
Choosing the right material for your outdoor sign can help it stand up to rain and other weather conditions. At National Neon Signs, we can help you find the right material for your sign. Contact us today to get started.
