HTS 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

All 9 HTS codes under heading 6806 (slag wool), with their duty rates from the 2026 HTS Revision 23. General duty Free to 3.9%.

Every line of heading 6806

  • 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.
  • 6806.10.00 Slag wool, rock wool and similar mineral wools (including intermixtures thereof), in bulk, sheets or rolls: General 3.9%; Special Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG); Column 2 30%.
  • 6806.10.00.10 Accoustical pads and boards (under: Slag wool, rock wool and similar mineral wools (including intermixtures thereof), in bulk, sheets or rolls) (m2).
  • 6806.10.00.20 Batts, not exceeding 61 cm in width (m2).
  • 6806.10.00.40 Batts, exceeding 61 cm in width (m2).
  • 6806.10.00.60 Pipe coverings (under: Other) (m2).
  • 6806.10.00.90 Other (under: Other) (m2).
  • 6806.20.00.00 Exfoliated vermiculite, expanded clays, foamed slag and similar expanded mineral materials (including intermixtures thereof) (kg): General Free; Special none; Column 2 30%.
  • 6806.90.00 Other (under: 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): General Free; Special none; Column 2 30%.
  • 6806.90.00.10 Accoustical pads and boards (under: Other) (m2).
  • 6806.90.00.20 Of molded calcium silicate (under: Other) (m2).
  • 6806.90.00.90 Other (under: Other) (kg).

About these rates

The rates are those printed in the 2026 HTS Revision 23, published by the U.S. International Trade Commission. A 10-digit statistical line takes the rates printed on the 8-digit line above it. Chapter 99 duties (Section 232, Section 301, IEEPA) depend on the product, the origin and the date, are charged on top, and are not included. A code here is a strong lead, not a ruling: confirm it with a customs broker or a CBP binding ruling.

Last reviewed 2026-11-12.