Natural Hydraulic Lime NHL 3.5 from Mexico
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.
Duty Rate — Mexico → United States
10%
Rate breakdown
9903.05.5510%Except for products described in headings 9903.05.85–9903.05.92 and 9903.05.94, articles the product of Mexico, as provided for in U.S. note 52 to this subchapter
Import Tips
• Include lab analysis showing 10-20% hydraulic components to confirm classification distinct from 2522.20 slaked lime
• Ensure packaging prevents premature hydration, which could lead to customs disputes over state of lime
• Declare accurately as unmixed lime to steer clear of Chapter 38 headings for prepared binders