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FAQs

Frequently asked questions from the world of engineering plastics can be found here.

Stock Shapes

What are the different UL 94 flammability ratings?

In the laboratory plastics are tested according to UL94 for flammability. They are assessed as horizontal burning (HB) or vertical burning (V) according to their fire behaviour.

Self Extinguishing

Test position

HB

V-2

V-1

V-0

Drips, melts with transfer of flame

Yes

Yes

No

No

Burning time (sec)

25

25

5

Burning time up to extinction (sec)

30

30

10

V-0 = self extinguishing, shortest burn time, highest safety
V-1 = self extinguishing, extended burn time, good safety
V-2 = self extinguishing, extended burn time, drips, melts could transfer fire, restricted safety
[HB] = non self extinguishing, good combustibility, [Burn time not defined).
Not for use with high safety requirements

Custom Casting

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Industrial Profiles

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