Labelmaster's International Wordless Toxic Gas Labels meet the design and durability standards of 49 CFR, ICAO and other international air regulations. The Hazard Class 2 labels can help you stay in compliance with standards set forth by the DOT. Hazmat labels are printed with light-fast inks for high durability, and adhesives are formulated for use in various climates and environments. Once affixed, International Wordless Toxic Gas Labels won't fade or fall off. Paper DOT hazmat labels adhere well to corrugated boxes.