Slag wool, rock wool and similar mineral wools (including intermixtures thereof), in bulk, sheets or rolls

This code covers slag wool, rock wool, and similar mineral wools, typically used for heat and sound insulation in bulk, sheets, or rolls. Use this code when importing these mineral wool products, keeping in mind duty is generally 3.9% but may be free for goods from eligible countries with which the U.S. has trade agreements.

HTS media

This tariff classification falls within Chapter 68, which covers articles of stone, plaster, cement, asbestos, mica, or similar materials. Specifically, code 6806.10.00 covers slag wool, rock wool, and similar mineral wools in bulk, sheets, or rolls, used for heat or sound insulation. Several statistical suffixes exist to further specify the type of mineral wool product, including acoustical pads/boards (6806.10.00.10), different sized batts (6806.10.00.20/40), pipe coverings (6806.10.00.60), and an ‘other’ category (6806.10.00.90) for products not fitting the other defined types, so choose the suffix that most accurately describes the product’s form and application.

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

3.90%

Standard trade partners (NTR)

Special Duty

Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG)

Eligible FTA or preference programs

The general duty rate for HTS code 6806.10.00 and all its subdivisions (6806.10.00.10, 6806.10.00.20, 6806.10.00.40, 6806.10.00.60, 6806.10.00.90) is 3.90%. However, a duty-free rate applies to imports originating from specific countries including Australia, Bahrain, and others listed as eligible for FTA or preference programs. These special rates apply to all subdivisions under 6806.10.00. Reporting for this HTS code and its subdivisions is required in square meters (m2). There is no information on bonded duty or other special duties.

Rate of Duty (Column 2): 30%

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Code Subdivisions

6806.10.00.10

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: > Slag wool, rock wool and similar mineral wools (including intermixtures thereof), in bulk, sheets or rolls > Accoustical pads and boards

Parent code

6806.10.00.20

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: > Slag wool, rock wool and similar mineral wools (including intermixtures thereof), in bulk, sheets or rolls > Other: > Batts, not exceeding 61 cm in width

6806.10.00.40

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: > Slag wool, rock wool and similar mineral wools (including intermixtures thereof), in bulk, sheets or rolls > Other: > Batts, exceeding 61 cm in width

6806.10.00.60

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: > Slag wool, rock wool and similar mineral wools (including intermixtures thereof), in bulk, sheets or rolls > Other: > Pipe coverings

6806.10.00.90

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: > Slag wool, rock wool and similar mineral wools (including intermixtures thereof), in bulk, sheets or rolls > 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

Revised every January & July

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