Decorated with white flames, this blue class 4 hazardous material warning label notes that the material is dangerous when wet. Available in a variety of materials, these Hazard Class 4 placards meet the requirements of 49 CFR 172.500 for domestic and international shipments of hazardous materials by highway, rail and water. It is offered in a range of size/material options, which are listed below. Dangerous substance labels Dangerous when wet. Or, download the editable version for just $3.99. Where required, our products are designed to conform to UK government regulations or follow best practice. Free to download and print. Our DOT-style hazmat signs and labels clearly identify potential transportation hazards in a familiar format. This Dangerous When Wet Sign is designed for use in the UK. This dangerous when wet sign features a flame symbol above the words dangerous when wet followed by a large, bold number 4. In light of the update from the Government on the 23 March 2020, Safety Signs and Notices Ltd would like to reassure all of our customers that we are currently "Open for Business" and will continue to service your needs for as long as possible. Dangerous goods diamond signs are hazard signs used for areas where dangerous goods are transported or may be stored. Blue DANGEROUS WHEN WET 4 DOT-style Sign or Label for Hazmat Transportation. Dangerous When Wet Sign. This surface-mount sign is available in a variety of sizes including DOT standard 10.75 x 10.75-in., as well as other sizes for other uses. Dangerous When Wet (1953) is a Technicolor Metro-Goldwyn-Mayer musical film starring Esther Williams, Fernando Lamas, and Jack Carson, directed by Charles Walters, and featuring an animated swimming sequence starring Williams with the cat-and-mouse duo, Tom and Jerry The sign comprises a blue background with white wording and symbols. Get the word out on your Dangerous Good shipments with Labelmaster's Dangerous When Wet Worded Placards.