HS Code for Rock Wool Insulation
The HS Code for rock wool insulation is 680610. The MFN duty rate for importing to the US is Free.
| HS Code (6-digit) | 680610 |
|---|---|
| US Duty Rate (MFN) | Free |
| EU Duty Rate (MFN) | 0% |
| Chapter | 68 |
| Heading | 6806 |
| Last Updated | 2026-05 |
Description
Slag wool, rock wool and similar mineral wools in bulk, sheets or rolls
HS Code 680610 covers slag wool and rock wool insulation in bulk, sheets, or rolls with a US MFN duty rate of Free.
Frequently Asked Questions
What are the specific import documentation and testing requirements for rock wool insulation (HTS 680610) entering the United States?
For rock wool insulation entering the U.S., the Environmental Protection Agency (EPA) requires a Toxic Substances Control Act (TSCA) Import Certification under 40 CFR Part 707.20. The importer must file either a positive certification (stating the product complies with TSCA) or a negative certification (if not subject to TSCA), with positive certification typically required for manufactured chemical substances like mineral wool. Additionally, the product may be subject to specific state-level requirements, such as California's Proposition 65 warning label if it contains listed chemicals.
Does the material composition of mineral wool insulation affect its classification under HTS 680610?
Yes, the specific mineral composition is critical. HTS 680610 applies specifically to insulation made from slag wool, rock wool, and similar siliceous mineral wools. If the product is made primarily from glass fibers (glass wool) instead, it would be classified elsewhere, typically under HTS 7019.
Similar or Alternative Classifications
Rock wool insulation is classified under heading 6806, specifically for 'slag wool, rock wool and similar mineral wools'. It should not be confused with other fibrous insulation materials. Glass wool insulation, which is visually and functionally similar, is classified separately under HTS 7019.90. Other common alternatives, such as cellulose or wood fiber insulation batts, are classified elsewhere, often under HTS 4504.90 or 4418.90. Always verify the mineral composition to ensure correct classification in heading 6806 versus these other chapters.
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