The FBC Flammable Sign is a medium-sized, rectangular metal sign with sharp, angular edges, typical of brutalist design. It features a bold, black and yellow color scheme with high-contrast, stenciled lettering reading 'FLAMMABLE' in a no-nonsense, industrial font. The sign's surface is slightly weathered, showing minor scratches and dents, suggesting it has been in use within the Federal Bureau of Control's harsh environments. The back includes mounting holes for installation on walls or doors, with a matte finish that reduces glare.