HTSBase
HTSUS, United States

6806.10.00.10

Accoustical pads and boards

Classification path

  1. Slag wool, rock wool and similar mineral wools; exfoliated vermiculite, expanded clays, foamed slag and similar expanded mineral materials; mixtures and articles of heat-insulating, sound-insulating or sound-absorbing mineral materials, other than those of heading 6811 or 6812, or of chapter 69
  2. Slag wool, rock wool and similar mineral wools (including intermixtures thereof), in bulk, sheets or rolls
  3. Accoustical pads and boards

Rates of duty

General (MFN)
3.9%
Column 2Cuba, North Korea, Russia, Belarus
30%
Unit of quantity
m2

Trade agreement rates

FreeGSP (lapsed since Dec 31, 2020), U.S.-Australia FTA, U.S.-Bahrain FTA, U.S.-Chile FTA, U.S.-Colombia TPA, AGOA (authorized through Dec 31, 2026), E, U.S.-Israel FTA, U.S.-Jordan FTA, U.S.-Korea FTA, U.S.-Morocco FTA, U.S.-Oman FTA, CAFTA-DR, U.S.-Panama TPA, U.S.-Peru TPA, USMCA, U.S.-Singapore FTA

Related lines in heading 6806

About heading 6806

Slag wool, rock wool and similar mineral wools; exfoliated vermiculite, expanded clays, foamed slag and similar expanded mineral materials; mixtures and articles of heat-insulating, sound-insulating or sound-absorbing mineral materials, other than those of heading 6811 or 6812, or of chapter 69

Heading 6806 covers mineral wools such as slag wool and rock wool, expanded mineral materials such as exfoliated vermiculite and expanded clay, and mixtures or articles of these materials used for heat, sound or acoustic insulation. It is split by material: 6806.10 for slag wool and rock wool in bulk, sheets or rolls, 6806.20 for exfoliated vermiculite, expanded clays, foamed slag and similar expanded minerals, and 6806.90 for other mixtures and articles. Goods of heading 6811, 6812 or chapter 69 are excluded.

Full guide to heading 6806

Products in this heading

  • Rock wool insulation batts in rolls
  • Slag wool loose fill in bulk bags
  • Mineral wool pipe coverings for steam lines
  • Acoustical pads and boards of mineral wool
  • Exfoliated vermiculite for loose fill insulation
  • Expanded clay lightweight aggregate
  • Foamed slag aggregate
  • Molded calcium silicate insulation shapes

Frequently asked questions

What is the HTS code for rock wool batts over 61 cm wide?

Rock wool batts exceeding 61 cm in width are classified under 6806.10.00.40, with a general (MFN) rate of 3.9%.

What is the duty on exfoliated vermiculite?

Exfoliated vermiculite is classified under 6806.20.00.00, and the general (MFN) rate is Free.

How do I classify molded calcium silicate insulation?

Molded calcium silicate articles fall under 6806.90.00.20, which carries a general (MFN) rate of Free. If the item is an acoustical pad or board instead, use 6806.90.00.10, also Free.

Source: USITC Harmonized Tariff Schedule, retrieved October 22, 2026.

HTS 6806.10.00.10: Accoustical pads and boards, 3.9% duty | HTSBase