US HTS + UK Tariff v4.0.1633 · updated 2026-10-21 · sources
Rates on this page are the official published schedule rates, shown for information. This is not a customs ruling: preference programs, Section 232/301 surcharges and per-shipment fees can change what you actually pay.
United States - HTS lines under 3910.00
Source: official Harmonized Tariff Schedule (USITC). "General" is the normal-trade-relations rate; "Special" lists preference programs; "Other" is the column-2 rate. Additional Section 232/301 duties may apply on top.
| HTS code | Description | General | Special | Other | Unit |
|---|---|---|---|---|---|
| 3910.00.00 | Silicones in primary forms | 3% | Free (A*,AU,BH,CL,CO,D,E,IL,JO,K,KR,MA,OM,P,PA,PE,S,SG) | 25% | kg |
Estimate the US duty runs in your browser · no caps
Enter the customs value (and quantity, when a rate is per-unit) to estimate the general-rate duty per HTS line. Estimates exclude Section 232/301 surcharges, MPF/HMF and fees. Not a customs ruling.
European Union - CN codes under 3910.00
Source: EU Combined Nomenclature (Eurostat, © European Union, reused per Decision 2011/833/EU). Duty rates and measures live in TARIC; each code links to the official consultation.
| CN code | Description | |
|---|---|---|
| 3910 00 00 | 3910 00 00 Silicones in primary forms | EU duty (TARIC) → |
United Kingdom - commodity codes under 3910.00
Source: UK Integrated Online Tariff (Open Government Licence v3.0). Declarable 10-digit codes go on the customs declaration; check the official page for the current duty and VAT measures.
| Commodity code | Description | |
|---|---|---|
| 3910 00 00 00 | Silicones in primary forms | UK duty & VAT → |
| 3910 00 00 10 | Liquid poly(methylhydrosiloxane) with terminal trimethylsilyl groups (CAS RN 63148-57-2) with a purity by weight of 99,9 % or more | UK duty & VAT → |
| 3910 00 00 15 | Dimethyl, methyl(propyl(polypropylene oxide)) siloxane (CAS RN 68957-00-6), trimethylsiloxy-terminated | UK duty & VAT → |
| 3910 00 00 20 | Block copolymer of poly(methyl-3,3,3-trifluoropropylsiloxane) and poly[methyl(vinyl)siloxane] | UK duty & VAT → |
| 3910 00 00 25 | Preparations containing by weight:<br> <br><br><br>- 10 % or more, 2-hydroxy-3-[3-[1,3,3,3-tetramethyl-1-[(trimethylsilyl)oxy] disiloxanyl] propoxy] propyl-2-methyl-2-propenoate (CAS RN 69861-02-5)and<br> <br><br><br>- 10 % or more, α-Butyldimethylsilyl- ω -3-[(2-methyl-1-oxo-2-propen-1-yl)oxy]propyl-terminated silicone polymer (CAS RN 146632-07-7)<br> | UK duty & VAT → |
| 3910 00 00 35 | Preparations containing by weight:<br> <br><br><br>- 30 % or more, α -Butyldimethylsilyl- ω -(3-methacryloxy-2-hydroxypropyloxy)propyldimethylsilyl-polydimethylsiloxane (CAS RN 662148-59-6) and<br> <br><br><br>- 10 % or more, N,N - Dimethylacrylamide (CAS RN 2680-03-7)<br> | UK duty & VAT → |
| 3910 00 00 40 | Silicones of a kind used in the manufacture of long term surgical implants | UK duty & VAT → |
| 3910 00 00 45 | Dimethyl Siloxane, hydroxy-terminated polymer with a viscosity of|38-100|mPa·s (CAS RN 70131-67-8) | UK duty & VAT → |
| 3910 00 00 50 | Silicone based pressure sensitive adhesive in solvent containing copoly(dimethylsiloxane/diphenylsiloxane) gum | UK duty & VAT → |
| 3910 00 00 55 | Preparation containing by weight:<br> <br><br><br>- 55 % or more but not more than 65 % of vinyl terminated polydimethylsiloxane (CAS RN 68083-19-2),<br> <br><br><br>- 30 % or more but not more than 40 % of dimethylvinylated and trimethylated silica (CAS RN 68988-89-6), and<br> <br><br><br>- 1 % or more but not more than 5 % of silicic acid, sodium salt, reaction products with chlorotrimethylsilane and isopropyl alcohol (CAS RN 68988-56-7)<br> | UK duty & VAT → |
| 3910 00 00 70 | Passivating silicon coating in primary form, to protect edges and prevent short circuits in semiconductor devices | UK duty & VAT → |
| 3910 00 00 85 | Two-component silicone, with a viscosity of the mixture of 3 000 cps or more, but not more than 6 000 cps (according to standard GB/T 2794) for use as an electrical insulation material in solar panels junction box in the production of solar panels | UK duty & VAT → |
| 3910 00 00 90 | Other | UK duty & VAT → |
Sources: U.S. International Trade Commission, Harmonized Tariff Schedule (public domain) · EU Combined Nomenclature © European Union, Eurostat (Decision 2011/833/EU) · UK Integrated Online Tariff, contains public sector information licensed under the Open Government Licence v3.0. Data refreshed weekly. Details on About & Data Sources.
Frequently asked questions
Common questions about HS code 3910.00.
What is HS code 3910.00?
HS code 3910.00 covers: Silicones in primary forms. It belongs to chapter 39 (Plastics and articles thereof) of the Harmonized System.
What is the US import duty for HS code 3910.00?
The US general (normal trade relations) rate is: 3%. Preference programs and Section 232/301 surcharges can change the effective rate; see the HTS lines for detail.
What is the UK commodity code for 3910.00?
The UK extends 3910.00 to 13 declarable 10-digit commodity codes, starting with 3910000000. The full code goes on the UK customs declaration.