At SRT Plastics, we specialize in the supply and precision fabrication of technical materials that meet the rigorous UL 94 flammability standards. As a global benchmark for fire safety, UL 94 classifies the burning behavior and self-extinguishing properties of plastics through standardized vertical and horizontal tests. Common industrial ratings - including HB, V-2, V-1, V-0, and 5V—are critical specifications for enclosures, mounting plates, and internal machine components. It is essential to recognize that these ratings are thickness-dependent; a material’s performance is intrinsically linked to its wall thickness and color formulation. We provide expert guidance on selecting Flame Retardant (FR) grades and offer high-tolerance CNC machining to ensure your finished parts maintain compliance with all relevant safety codes and documentation requirements.
UL 94 uses vertical and horizontal test methods to classify burning behavior and dripping. Ratings are assigned to a specific grade and thickness. V 0 indicates the most stringent vertical classification in this group while HB is a basic horizontal classification.
Tell us your target rating and minimum thickness and we will match suitable grades and provide documentation where available.
Flame results often change with thickness and color because additives and pigments influence performance. Always specify the required rating together with the minimum wall thickness and color. If your design uses multiple thicknesses choose the rating that covers the thinnest section. We can suggest material grades that retain performance at your target thickness.
Many FR ABS and PC ABS grades achieve UL 94 V 0 at defined thickness. Polycarbonate can also meet high ratings depending on the formulation and thickness. We can source and machine sheets plates and covers to your drawings and supply a Certificate of Conformity. Supplier test reports are available where applicable for the chosen grade and thickness.
