Natural Hydraulic Lime (NHL) 5.0 is the hardest of the NHL's.

Natural Hydraulic Lime (NHL) 5.0


is used extensively for limecrete flooring and is appropriate in areas of extreme exposure. NHL 5.0 is the hardest of the NHL’s, we recommend caution where it is used.


Natural Hydraulic Lime (NHL) 5.0, by Roundtower  is perfect in areas of high exposure:

  • Marine Environments
  • Wall Coping
  • Limecrete (floors)
  • Hempcrete (walls)
  • Bridge Abutments
  • Patios
  • Sidewalks

NHL 5.0 offers the maximum strength and durability of the 3 classifications of  NHL’s. Mix with sand to make Limecrete for floors. Mix with Course Hemp for Hempcrete walls. Hempcrete walls are a green healthy renewable environmentally friendly, resistant to: viruses, bacteria, and mold, alternative to today’s modern drywall, gypsum, and concrete. Roundtower NHL’s will set in the presence of water which makes them ideal for use on exterior applications.

Natural Hydraulic Lime (NHL) 5.0 is extremely hard, use caution where it is installed. Remember the mortar must be softer than the surroundings!

The color of the sand that you add, will largely determine the color. Add Pigments to even further customize your mortar! 

Available in 55 lb (25KG) bags.

1 Ton Super Sacks and pallets are available. Call for lead time and pricing!

NHL Coverage Sheet 

NHL Tech Sheet

Safety Data Sheet

NHL Installation 

NHL Installation Guide


Additional information

Weight 59 lbs
Dimensions 24 × 16 × 8 in


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