Generally, the fire retardant grade of silicone tube is divided into UL94-V2, UL94-V1, and UL94-V0, with the flame retardant grade increasing in order, the specific method to distinguish the grades is as follows.

V-2: After two 10-second burn tests on the sample, the flame is extinguished within 60 seconds. Burning material may be dropped.

V-1: After two 10-second burn tests on the sample, the flame is extinguished within 60 seconds. No combustible material can fall.

V-0: After two 10-second burn tests on the sample, the flame goes out within 30 seconds. No combustibles should fall.

The above methods are the distinguishing methods in the silicone rubber industry, if you have any special requirements, please communicate clearly when contacting our chinaman.

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