Silicone Rubber Silica Compound Paste
High-consistency silicone rubber paste compounded with silica fillers for extrusion, in primary paste form. Classified in HTS 4005.10.00.00 as unvulcanized synthetic rubber compounded with silica, meeting primary form definitions.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If silicone considered siloxane polymer
Certain silicone polymers without rubber vulcanization properties classify in plastics Chapter 39.
If synthetic rubber not compounded with silica/carbon black
Uncompounded synthetic rubber mixtures remain in 4002.
If made into transmission belting
Finished belting from such compounds falls under 4010.
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Import Tips & Compliance
• Pastes must qualify as primary forms; dried or shaped versions go to 4008
• Certify silica as the compounding agent—no pigments beyond identification
Related Products under HTS 4005.10.00.00
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