Exfoliated vermiculite, expanded clays, foamed slag and similar expanded mineral materials (including intermixtures thereof)
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: > Exfoliated vermiculite, expanded clays, foamed slag and similar expanded mineral materials (including intermixtures thereof)
Duty Rate (from China)
Except for products described in headings 9903.03.02–9903.03.11, articles the product of any country, as provided for in subdivision (aa) of U.S. note 2 to this subchapter
Except as provided in headings 9903.88.13, 9903.88.18, 9903.88.33, 9903.88.34, 9903.88.35, 9903.88.36, 9903.88.37, 9903.88.38, 9903.88.40, 9903.88.41, 9903.88.43, 9903.88.45, 9903.88.46, 9903.88.48, 9903.88.56, 9903.88.64, 9903.88.66, 9903.88.67, 9903.88.68, or 9903.88.69, articles the product of China, as provided for in U.S. note 20(e) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(f)
Products classified under HTS 6806.20.00.00
Exfoliated Vermiculite Insulation
Exfoliated vermiculite is a lightweight, expanded form of the mineral vermiculite heated to create airy layers for superior thermal insulation. It falls under HTS 6806.20.00.00 as an exfoliated mineral material used in construction and gardening for heat and sound insulation. This product is expanded through thermal processing, distinguishing it from raw minerals.
Expanded Clay Pebbles (LECA)
Lightweight Expanded Clay Aggregate (LECA) consists of clay pellets expanded at high temperatures for use in hydroponics and drainage. Classified under HTS 6806.20.00.00 due to its foamed, expanded mineral structure providing insulation and lightweight fill. Ideal for soil aeration and aquaponic systems.
Foamed Slag Aggregate
Foamed slag is produced by expanding blast furnace slag with air or steam for use as lightweight concrete aggregate. It matches HTS 6806.20.00.00 as a similar expanded mineral material for construction insulation and sound absorption. Provides thermal properties in building fills.
Vermiculite-Expanded Clay Mix
A premixed intermixture of exfoliated vermiculite and expanded clay for horticultural potting media and insulation fills. Covered by HTS 6806.20.00.00 explicitly including intermixtures of expanded mineral materials. Offers balanced drainage and insulation properties.
Perlite-Vermiculite Insulation Blend
Expanded perlite mixed with exfoliated vermiculite creates a high-performance loose-fill insulation for attics and walls. Falls under HTS 6806.20.00.00 as intermixtures of similar expanded mineral materials (noting perlite expansion aligns). Excellent for sound and heat insulation.
Hydroton Expanded Clay Balls
Hydroton brand expanded clay balls are spherical lightweight aggregates for hydroponic growing systems. Classified in HTS 6806.20.00.00 as expanded clays used in inert media applications. Reusable and pH neutral for plant root support.
Foamed Slag Lightweight Fill
Coarse foamed slag granules serve as lightweight fill material in civil engineering projects like road bases. HTS 6806.20.00.00 covers these expanded mineral products for structural insulation. Reduces overall project weight significantly.
Exfoliated Vermiculite Fireproofing Mix
Exfoliated vermiculite blended for fireproof plaster and concrete additives enhances non-combustibility. Under HTS 6806.20.00.00 as expanded mineral intermixture for heat-insulating applications. Meets building fire safety standards.
Expanded Clay Hydroponic Substrate
Pre-washed expanded clay substrate optimized for commercial hydroponic farms as inert growing medium. HTS 6806.20.00.00 includes these expanded clays for agricultural insulation and support. Sterile and reusable for clean cultivation.
Vermiculite Pool Filter Media
Granular exfoliated vermiculite serves as filtration media in swimming pool and spa systems. Classified HTS 6806.20.00.00 for expanded mineral materials used in water treatment filtration. High filtration efficiency with easy backwashing.
Mixed Expanded Mineral Loose Fill Insulation
Loose-fill insulation combining exfoliated vermiculite, expanded clay, and foamed slag for attic blowing applications. HTS 6806.20.00.00 explicitly covers such intermixtures for heat/sound insulation. R-value optimized for energy efficiency.
Exfoliated Vermiculite Packing Material
Exfoliated vermiculite used as void fill and shock-absorbing packaging for fragile electronics and instruments. Under HTS 6806.20.00.00 as expanded mineral material providing lightweight cushioning. Dust-free grades available.
Expanded Clay Geothermal Fill
Expanded clay aggregate used as backfill around geothermal heat exchanger loops for thermal conductivity. HTS 6806.20.00.00 classification for expanded mineral materials in energy applications. Prevents loop settling.
Foamed Slag Concrete Additive
Fine foamed slag powder incorporated into lightweight concrete mixes for improved insulation. Covered by HTS 6806.20.00.00 as expanded mineral intermixture component. Reduces concrete density by 20-30%.
Vermiculite-Expanded Perlite Chimney Insulation
High-temperature vermiculite-perlite mix for insulating prefabricated chimney liners and flues. HTS 6806.20.00.00 for expanded mineral heat-insulating intermixtures. Rated for continuous 1000°C exposure.