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.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If unslaked or quicklime variant
Lacks hydraulic impurities; classified as quicklime rather than hydraulic lime.
If slaked with water but non-hydraulic
Hydraulic setting absent; falls under slaked lime excluding Chapter 2825 products.
If mixed with Portland cement components
Becomes hydraulic cement when blended with clinker, shifting to Chapter 25 cements.
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Import Tips & Compliance
• Obtain certificates verifying hydraulic properties and natural origin to avoid reclassification as slaked lime under 2522.20
• Check for free moisture content limits, as excessive water may trigger heading 2522.10 classification for quicklime
• Provide end-use documentation for construction to prevent misclassification under Chapter 38 cement mixtures
Related Products under HTS 2522.30.00.00
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.