The Universal Selection Source: Plastics & Elastomers


Flammability UL94

UL 94 (Underwriters Laboratories test standard UL 94) is the most widely used test for determining a specimen's relative flammability, its ability to extinguish the flame after ignition and its dripping behavior. UL94 covers two types of testing: vertical burn and horizontal burn.

We chose to highlight the most common ratings found in plastics: HB = Slow burning; V2=extinction within 30 seconds + Dripping; V1= extinction within 30 seconds, No Dripping; V0= extinction within 10 seconds, No Dripping.

Other tests and ratings are possible according to UL 94. Vertical Testing (5V, 5VA, 5VB): testing is done on both bar and plaque specimens. Vertical Testing of Thin Materials (VTM-0, VTM-1, VTM-2): test used for thin materials, or materials that are too flexible or may distort, shrink or flex during the traditional vertical testing.


Disclaimer: all data and information obtained via the Polymer Selector including but not limited to material suitability, material properties, performances, characteristics and cost are given for information purpose only. Although the data and information contained in the Polymer Selector are believed to be accurate and correspond to the best of our knowledge, they are provided without implied warranty of any kind. Data and information contained in the Polymer Selector are intended for guidance in a polymer selection process and should not be considered as binding specifications. The determination of the suitability of this information for any particular use is solely the responsibility of the user. Before working with any material, users should contact material suppliers in order to receive specific, complete and detailed information about the material they are considering. Part of the data and information contained in the Polymer Selector are genericised based on commercial literature provided by polymer suppliers and other parts are coming from assessments of our experts.

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