Containing 5 percent or more by weight of one or more aromatic or modified aromatic substances
Prepared binders for foundry molds or cores; chemical products and preparations of the chemical or allied industries (including those consisting of mixtures of natural products), not elsewhere specified or included: > Prepared additives for cements, mortars or concretes: > Containing 5 percent or more by weight of one or more aromatic or modified aromatic substances
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 3824.40.10.00
Aromatic Plasticizer Concrete Admixture
A liquid additive for cement and concrete mixes containing over 5% aromatic substances like alkylbenzene sulfonates to improve workability and reduce water demand. It falls under HTS 3824.40.10.00 due to its high aromatic content used as a prepared additive for concretes. This ensures better flow and strength in construction applications.
Polystyrene-Based Cement Dispersant
A powdered dispersant with modified polystyrene (aromatic polymer) exceeding 5% by weight, added to concrete to prevent clumping and enhance uniformity. Classified in 3824.40.10.00 for its aromatic-modified substances in concrete preparations. Ideal for high-performance ready-mix applications.
Aromatic Sulfonate Water Reducer for Mortar
Concentrated liquid water-reducing agent with sodium naphthalene sulfonate (>5% aromatic) for mortars and concretes, improving strength by minimizing water. HTS 3824.40.10.00 applies due to aromatic substance threshold in prepared additives. Commonly used in tile adhesives and masonry.
Modified Styrene Acrylic Concrete Superplasticizer
High-range water reducer blending styrene (aromatic) and acrylic polymers over 5% by weight for self-compacting concrete. Falls under 3824.40.10.00 as aromatic-containing prepared concrete additive. Enables pumpable mixes with superior slump retention.
Benzene Derivative Accelerating Admixture for Concrete
Set-accelerating liquid with benzene-based compounds (>5% aromatics) to speed concrete curing in cold weather. HTS 3824.40.10.00 for aromatic prepared additives in concretes. Reduces waiting time for formwork removal.
Toluene-Modified Air Entraining Agent
Foaming additive with toluene-modified resins (aromatic >5%) creating microscopic air bubbles in concrete for freeze-thaw resistance. Classified 3824.40.10.00 as aromatic concrete preparation. Essential for durable pavements and bridges.
Xylene-Based Waterproofing Concrete Additive
Penetrating sealer admixture with xylene derivatives (>5% aromatics) for hydrophobic concrete surfaces. HTS 3824.40.10.00 due to aromatic content in mortar/concrete preparations. Prevents water ingress in basements and pools.
Aromatic Polyol Retarder for High-Performance Concrete
Sugar-derived polyol retarder with aromatic modifiers (>5%) extending concrete setting time for hot weather pours. Under 3824.40.10.00 for aromatic concrete additives. Allows large continuous placements without cold joints.