Hazardous Waste – Decals, signs and banners for hazardous materials are also provided by us. These can be ordered in 6" x 6" boards with Red or Black lettering on yellow backgrounds. Hazardous materials also can be custom designed to personal preference. Hazardous material signs, Hazardous Waste signs, Hazardous and polluted areas as well as banners or warning signs for Hazardous smoke and toxic gas are made available upon our customer requests.