Hydraulic lime
Quicklime, slaked lime and hydraulic lime, other than calcium oxide and hydroxide of heading 2825: > Hydraulic lime
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 2522.30.00.00
Natural Hydraulic Lime NHL 2
Natural hydraulic lime NHL 2 is a powdered binder made from limestone containing natural silica and alumina impurities, calcined to produce hydraulic properties. It sets and hardens through a chemical reaction with water, even underwater, distinguishing it from non-hydraulic limes. Classified under HTS 2522.30.00.00 as hydraulic lime, excluding calcium oxide and hydroxide of heading 2825.
Natural Hydraulic Lime NHL 3.5
NHL 3.5 is a moderately hydraulic lime derived from argillaceous limestone, fired at low temperatures to retain pozzolanic reactivity. It offers balanced strength for lime mortars in masonry restoration and breathable plasters. HTS 2522.30.00.00 covers this as pure hydraulic lime before mixing into final products.
Emoder Natural Hydraulic Lime
Emoder is a commercial grade natural hydraulic lime from calcined marlstone, providing early strength for pointing and rendering in conservation projects. Its hydraulic nature allows curing in damp conditions without pure air slaking. Falls squarely under HTS 2522.30.00.00 for hydraulic lime other than 2825 products.
Hotkin Natural Hydraulic Lime NHL 5
Hotkin NHL 5 is an eminently hydraulic lime from silica-rich limestone, suitable for structural mortars and hydraulic renders requiring higher strength. It hardens via both carbonation and hydration processes. HTS 2522.30.00.00 specifically includes this as hydraulic lime excluded from 2825.
Solem Natural Hydraulic Lime Powder
Solem hydraulic lime powder is finely ground from naturally impure chalk, used in lime-pozzolan mortars for sustainable construction. It develops strength through hydraulic set in low-permeability environments. Classified in 2522.30.00.00 as unmixed hydraulic lime.