When it comes to hazard labels, there's simply no room for cutting corners or taking chances. Feature outstanding durability to withstand even the most abrasive elements and harsh environments. Printed with ink-fast inks and designed for strong adhesion, these labels won't fade or fall off. They're a great way to help ensure your company's compliance with DOT standards. Heavyweight, coated paper labels. Paper, and labels pass the DOT 30-day exposure requirement. Hazard class labels are required for shipping hazmat by ground, rail, air and sea, hazard class labels must be used on certain bulk and non-bulk packages.