At StarSignBoards, our Prohibition Signs are designed to deliver strong, unmistakable warnings that help prevent accidents and ensure compliance across workplaces, public areas, and industrial sites. These signs use bold red circles, diagonal slashes, and crisp icons to instantly communicate what actions are strictly not allowed — from No Smoking and No Entry to No Mobile Phones, No Parking, and more. Each sign is crafted with high-quality, weather-resistant materials that guarantee long-lasting visibility, whether installed indoors or outdoors. Our designs follow standard safety guidelines, making them easy to understand for everyone, even at a quick glance. With clear instructions and universal symbols, StarSignBoards’ Prohibition Signs help maintain order, support safety protocols, and reduce risks effectively. Choose from our wide range of ready-made options or request custom signs tailored to your specific needs.