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

9 declarable lines

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.

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

How to choose the right subheading

Material: slag wool or rock wool goes to 6806.10, expanded minerals such as vermiculite or expanded clay go to 6806.20, and other mineral mixtures and articles go to 6806.90.
Form: bulk, sheets or rolls of mineral wool fall in 6806.10; check whether the goods are batts, pipe coverings or other forms.
Batt width: mineral wool batts not exceeding 61 cm in width and batts exceeding 61 cm in width are separate lines.
Use: acoustical pads and boards have their own lines under both 6806.10 and 6806.90.
Composition: molded calcium silicate articles are named separately within 6806.90.

Often confused with

Corrugated asbestos-cement roofing sheets
Articles of asbestos-cement belong to heading 6811, not 6806.
Heading 6811
Asbestos gaskets and woven asbestos fabric
Fabricated asbestos fibers and articles of them are classified in 6812.
Heading 6812
Unmounted brake pads and clutch facings
Friction material and articles of it go to heading 6813.
Heading 6813
Plaster boards and other plaster articles
Articles of plaster or plaster compositions are covered by heading 6809.
Heading 6809
Refractory ceramic fiber blanket
Refractory goods of ceramic materials are classified in chapter 69, which heading 6806 excludes.

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.

Guide written from the official schedule text. Rates quoted are general (MFN) rates; check the line page for trade agreement rates and the classification of your exact product.