HTS code 3910 — Silicones in primary forms

Tariff lines under heading 3910

Full 10-digit codes with their general (MFN) duty rates. The correct line depends on the product's material, construction, and use.

Documents required to import under 3910

Customs paperwork typically required to import these goods into the United States. Conditional items depend on shipment value, transport mode, or origin.

• Commercial InvoiceRequired
• Packing ListRequired
• Bill of Lading / Airway BillRequired
• CBP Entry Summary (7501)Required

  Prepared and filed by your customs broker

• CBP Entry / Release (3461)Required

  Prepared and filed by your customs broker

• Customs Bond (CBP 301)Conditional

  Required for formal entries — generally shipments valued over $2,500

  Single-entry or continuous bond, obtained through your broker or a surety

• Importer Security Filing (ISF "10+2")Conditional

  Required for ocean freight only

  Filed electronically at least 24 hours before loading at the foreign port

• Importer ID Input Record (CBP 5106)Conditional

  Required to establish or update your importer-of-record number with CBP

  One-time setup for a new importer; not filed per shipment

• Entry Manifest (CBP 7533)Conditional

  Alternative to the 3461 for informal, low-value, or contiguous-country entries

Common questions

What is HTS code 3910?

HTS heading 3910 covers silicones in primary forms. It sits in Chapter 39 (plastics) of the US Harmonized Tariff Schedule and contains 1 tariff line.

What is the duty rate for HTS 3910?

General duty rate of 3%. The general rate applies to most-favoured-nation trading partners; goods from countries with a free trade agreement may qualify for a reduced or duty-free special rate.

How many digits does a full HTS code have?

US import entries require the full 10-digit HTS code. Heading 3910 is the first four digits — the remaining six narrow it down to the specific product, which is what determines the duty rate you actually pay.

Related headings in Chapter 39

• 3901Polymers of ethylene, in primary forms
• 3902Polymers of propylene or of other olefins, in primary forms
• 3903Polymers of styrene, in primary forms
• 3904Polymers of vinyl chloride or of other halogenated olefins, in primary forms
• 3905Polymers of vinyl acetate or of other vinyl esters, in primary forms; other vinyl polymers in primary forms
• 3906Acrylic polymers in primary forms
• 3907Polyacetals, other polyethers and epoxide resins, in primary forms; polycarbonates, alkyd resins, polyallyl esters and other polyesters, in primary forms
• 3908Polyamides in primary forms