6806.90.00.90
Other
Classification path
- 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
- Other
- Other
- Other
Rates of duty
- General (MFN)
- Free
- Column 2Cuba, North Korea, Russia, Belarus
- 30%
- Unit of quantity
- kg
Related lines in heading 6806
- 6806.10.00.10Accoustical pads and boards3.9%
- 6806.10.00.20Batts, not exceeding 61 cm in width3.9%
- 6806.10.00.40Batts, exceeding 61 cm in width3.9%
- 6806.10.00.60Pipe coverings3.9%
- 6806.10.00.90Other3.9%
- 6806.20.00.00Exfoliated vermiculite, expanded clays, foamed slag and similar expanded mineral materials (including intermixtures thereof)Free
- 6806.90.00.10Accoustical pads and boardsFree
- 6806.90.00.20Of molded calcium silicateFree
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 6806Products 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.