Historical & Geological Context
NHL 5 is the most robust grade of pure natural hydraulic lime. Designed for structural masonry subjected to severe damp, freeze-thaw exposure, coastal sea spray, or riverfront retaining walls. It cures reliably under humid conditions while remaining chemical-free and respectful of adjacent natural stone.
Petrographic & Geological Characteristics
Siliceous argillaceous limestone providing higher early compressive strength.
Lime Mortar & Breathability Compatibility
Recommended for exposed parapets, sea-walls, marine quays, and damp foundation masonry.
Provenance & Historical Sourcing
Burgundian hydraulic stone deposits.
Condition Report & Patina
Certified EN 459-1 pure NHL 5.
Chaux Hydraulique Éminente (NHL 5)
Bourgogne, France (FR)
Non-commercial reference. Not sold or brokered by Le Cercle du Roi.
This material dossier is compiled from public geological surveys, heritage conservation research (BRGM, CTMNC, Historic England, Monumentenwacht), and historical treatises. Inclusion does not constitute a sales offer by Le Cercle du Roi.