NMC fire sign. The location of flammable substances, fire alarms, hoses, extinguishers, blankets, and evacuation exits and routes must be clearly marked throughout your facility to not only prevent a fire, but also help ensure your employees' safety. Legend "FLAMMABLE". Made of adhesive vinyl. Indoor use. OSHA Compliant. Measures 12-inches length by 4-inches height. 0.004 material has pressure sensitive adhesive backing and is flexible, which allows for mounting on smooth, curved or irregular surfaces. The material is long-lasting. Mounting: yes. Good chemical resistance. Maximum temperature: 178 degrees F.