Prepared additives for cements, mortars or concretes
Prepared binders for foundry moulds 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 > Prepared additives for cements, mortars or concretes
Duty Rate (from China)
Products classified under Tariff item 3824.40.00.00
Aluminum Powder Concrete Aerating Agent
> Fine aluminum powder prepared with inorganic gas-generating activators to produce air-entrained concrete for freeze-thaw resistance. This product is a prepared additive for cements, mortars, or concretes, creating stable microscopic air bubbles.
3824.40.00Aromatic 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. This product is a prepared additive specifically formulated for use in cements, mortars, or concretes, and is classified under tariff item 3824.40.00.
3824.40.00Aromatic Polyol Retarder for High-Performance Concrete
> A sugar-derived polyol retarder with aromatic modifiers (>5%) extending concrete setting time for hot weather pours. This product is a prepared additive for cements, mortars, or concretes, designed to control setting time and improve workability in high-temperature conditions.
3824.40.00Aromatic Sulfonate Water Reducer for Mortar
> A concentrated liquid water-reducing agent with sodium naphthalene sulfonate (>5% aromatic) for mortars and concretes, improving strength by minimizing water. This product is a prepared additive specifically designed for use in cementitious mixes, falling under tariff item 3824.40.00.
3824.40.00Barium Metaborate Concrete Fire Retardant
> Inorganic barium metaborate powder incorporated into cement mixes to impart fire resistance and reduce combustible material passage. This product is a prepared additive for cements, mortars, or concretes, classified under tariff item 3824.40.00.
3824.40.00Benzene Derivative Accelerating Admixture for Concrete
> A set-accelerating liquid with benzene-based compounds (>5% aromatics) to speed concrete curing in cold weather. This product is a prepared additive for cements, mortars, or concretes, designed to accelerate setting and reduce waiting time for formwork removal.
3824.40.00Calcium Sulfonate Concrete Accelerator
> A powdered additive made entirely from inorganic calcium sulfonate compounds used to accelerate the setting time of concrete in cold weather applications. This product is a prepared additive for cements, mortars, or concretes, falling under tariff item 3824.40.00.
3824.40.00Cerium Oxide Concrete Polishing Accelerator
> Nano-cerium oxide slurry used to accelerate mechanical polishing of concrete floors by chemically softening surface cement paste. This product is a prepared additive for cements, mortars, or concretes, classified under tariff item 3824.40.00.
3824.40.00Colloidal Silica Concrete Densifier
> Nano-particle suspension of amorphous silica in water used to chemically densify concrete by filling capillary pores and reacting with calcium hydroxide. This product is a prepared additive for cements, mortars, or concretes, classified under tariff item 3824.40.00.
3824.40.00Gypsum-Based Concrete Retarder
> A powdered inorganic blend primarily of calcined gypsum and phosphates used to extend working time of concrete in hot weather conditions. This product is a prepared additive for cements, mortars, or concretes, classified under tariff item 3824.40.00.
3824.40.00Lithium Silicate Concrete Densifier
> A colloidal solution of lithium silicate used to densify and harden freshly placed concrete surfaces by chemical reaction forming calcium silicate hydrate. This product is a prepared additive for cements, mortars, or concretes, classified under tariff item 3824.40.00.
3824.40.00Modified Styrene Acrylic Concrete Superplasticizer
> A high-range water reducer blending styrene (aromatic) and acrylic polymers over 5% by weight for self-compacting concrete. This product is a prepared additive for cements, mortars, or concretes, enabling pumpable mixes and enhancing workability.
3824.40.00Polystyrene-Based Cement Dispersant
> A powdered dispersant with modified polystyrene (aromatic polymer) exceeding 5% by weight, added to concrete to prevent clumping and enhance uniformity. This product is a prepared additive for cements, mortars, or concretes, classified under tariff item 3824.40.00.
3824.40.00Toluene-Modified Air Entraining Agent
> A foaming additive with toluene-modified resins (aromatic >5%) creating microscopic air bubbles in concrete for freeze-thaw resistance. This product is a prepared additive for cements, mortars, or concretes, essential for durable pavements.
3824.40.00Xylene-Based Waterproofing Concrete Additive
> A penetrating sealer admixture with xylene derivatives (>5% aromatics) for hydrophobic concrete surfaces. This product is a prepared additive for cements, mortars, or concretes, preventing water ingress in basements and other structures.