What's UL 94 flammability tests

UL is the abbreviation for the Underwriters Laboratories, this is an independent organisation in the United States to control and certificate product safety. UL provide safety related certification, validation, inspection and testing services to a range of clients including manufacturers, retailers, policy makers and regulators.

Contained within their extensive list of testing and product standards, the UL also specified the flammability test for UL94 for plastic materials. UL94 is a material burning test done on a defined specimen of raw material of the product in question. It does not, however, carry out a flame test on the final product.

UL94 differs between a horizontal burning test UL94 HB and a vertical burning test UL94 V.

For the vertical test UL94 V, there are three flame ratings defined: UL94 V0, UL94 V1 and UL94 V2.

Additional information


UL 94 HB
Slow burning on a horizontal specimen; burning rate < 76 mm/min for thickness < 3 mm and burning stops before 100 mm. 


UL 94 V-2
The test samples are extinguished within 25 seconds average time (mean of 10 successive tests). None of the test samples burn longer than 30 seconds. The test samples emit some burning particles.


UL 94 V-1
The test samples are extinguished within 25 seconds average time (mean of 10 successive tests). None of the test samples burn longer than 30 seconds. None of the test samples emit burning particles.


UL 94 V-0
The test samples are extinguished within 5 seconds average time (mean of 10 successive tests). None of the test samples burn longer than 10 seconds. None of the test samples emit burning particles.

Zikko products with this rating: 

eLUGGAGE S (ES400)

eLUGGAGE X (EX300)

eLUGGAGE L (EL200)


UL94 5VB
Burning of the test sample stops within 60 seconds on a vertical specimen; no drips allowed; plaque specimens may develop a hole.


UL94 5VA
Burning of the test sample stops within 60 seconds on a vertical specimen; no drips allowed; plaque specimens may not develop a hole.

For more information of UL classification ,  contact us for more details.