Other

This code covers mineral wools, exfoliated materials, and similar heat/sound insulating products, as well as mixtures and articles made from these materials. Use this code for classifying these insulation and acoustic products, noting that most are duty-free, as detailed within Chapter 68 of the Harmonized Tariff Schedule.

HTS media

This tariff classification falls within Chapter 68, which covers articles of stone, plaster, cement, asbestos, mica or similar materials. Specifically, 6806.90.00 covers other mineral wools, exfoliated materials, and similar expanded mineral materials, as well as mixtures and articles providing heat or sound insulation, excluding those covered elsewhere in the tariff schedule. This code has several statistical suffixes, including 6806.90.00.10 for acoustical pads and boards, 6806.90.00.20 for molded calcium silicate products, and 6806.90.00.90 for all other products within this category, so choose the suffix that most accurately describes the specific article being classified.

Chapter	Chapter 68: Articles of stone, plaster, cement, asbestos, mica or similar materials
Section	Section XIII: Articles of Stone, Plaster, Cement, Asbestos, Mica or Similar Materials; Ceramic Products; Glass and

Duty Snapshot

Quick view of the available duty information for this HTS code.

General Duty

Free

Standard trade partners (NTR)

Special Duty

Not available

Eligible FTA or preference programs

The general duty rate for HTS code 6806.90.00 and all its subdivisions (6806.90.00.10, 6806.90.00.20, and 6806.90.00.90) is free, applying to imports from standard trade partners (NTR). Special rates are not specified, but eligibility for FTA or preference programs may offer reduced or zero duty rates. Reporting units are kilograms (kg) and square meters (m2), and must be used when declaring imports under this code.

Rate of Duty (Column 2): 30%

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Code Subdivisions

6806.90.00.10

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 > Accoustical pads and boards

Parent code

6806.90.00.20

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: > Of molded calcium silicate

6806.90.00.90

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

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Chapter & Section Notes

Chapter Notes

Harmonized Tariff Schedule of the United States Revision 29 (2025) Annotated for Statistical Reporting Purposes CHAPTER 68 ARTICLES OF STONE, PLASTER, CEMENT, ASBESTOS, MICA OR SIMILAR MATERIALS XIII 68-1 Notes 1. This chapter does not cover: (a) Goods of chapter 25; (b) Coated, impregnated or covered paper and paperboard of heading 4810 or 4811 (for example, paper and paperboard coated with mica powder or graphite, bituminized or asphalted paper and paperboard); (c) Coated, impregnated or covered textile fabric of chapter 56 or 59 (for example, fabric coated or covered with mica powder, bituminized or asphalted fabric); (d) Articles of chapter 71; (e) Tools or parts of tools, of chapter 82; (f) Lithographic stones of heading 8442; (g) Electrical insulators (heading 8546) or fittings of insulating material of heading 8547; (h) Dental burrs (heading 9018); (ij) Articles of chapter 91 (for example, clocks and clock cases); (k) Articles of chapter 94 (for example, furniture, luminaires and lighting fittings, prefabricated buildings); (l) Articles of chapter 95 (for example, toys, games and sports equipment); (m) Articles of heading 9602, if made of materials specified in note 2(b) to chapter 96, or of heading 9606 (for example, buttons), of heading 9609 (for example, slate pencils), heading 9610 (for example, drawing slates) or of heading 9620 (monopods, bipods, tripods and similar articles); or (n) Articles of chapter 97 (for example, works of art). 2. In heading 6802 the expression "worked monumental or building stone" applies not only to the varieties of stone referred to in heading 2515 or 2516, but also to all other natural stone (for example, quartzite, flint, dolomite and steatite) similarly worked; it does not, however, apply to slate. Additional U.S. Notes 1. For the purposes of heading 6802, the term " slabs" embraces flat stone pieces, not over 5.1 cm in thickness, having a facial area of 25.8 cm2 or more, the edges of which have not been beveled, rounded or otherwise processed except such processing as may be needed to facilitate installation as tiling or veneering in building construction. 2. For the purposed of heading 6810, the term " tiles" does not include any article 3.2 cm or more in thickness. Harmonized Tariff Schedule of the United States Revision 29 (2025) Annotated for Statistical Reporting Purposes XIII 68-2

Section Notes

SECTION XIII ARTICLES OF STONE, PLASTER, CEMENT, ASBESTOS, MICA OR SIMILAR MATERIALS; CERAMIC PRODUCTS; GLASS AND GLASSWARE XIII-1 Harmonized Tariff Schedule of the United States Revision 29 (2025) Annotated for Statistical Reporting Purposes XIII-2 Harmonized Tariff Schedule of the United States Revision 29 (2025) Annotated for Statistical Reporting Purposes

Latest update

Last updated

November 15, 2025

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