Hydraulic Lime Mortar | 100% Natural, Traditional Lime

NHL 2 Lime Mortar

Internal Work or Soft Masonry

Flexible and slow setting, suitable for interior brickwork. Also suitable for soft masonry and conservation of materials that are decaying or crumbling.
NHL 3.5 Lime Mortar

Most External Building Work

Hydraulic lime mortar mix for most types of brick & stone masonry. General building, walling, pointing and patching. The Most Widely Used
NHL 5 Lime Mortar

Dense or Exposed Masonry

Hydraulic lime mortar mix for exposed or dense brick and stone. Harder, faster setting mix for masonry and render exposed to severe conditions.

Most Popular Hydraulic Lime Mortars

NHL 3.5 Lime Mortar

Fox Cragg (25kg)
- Medium
- Oatmeal
- Off-White
Rustic lime mortar with a medium coarse texture and an oatmeal appearance.
Product Details
NHL 3.5 Lime Mortar

Elm Cragg (25kg)
- Fine
- Oatmeal
- Off-White
Oatmeal lime mortar with fine texture and neutral, even appearance.
Product Details
NHL 3.5 Lime Mortar

Ravenfell (25kg)
- Medium
- Blond
A medium coarse lime mortar, straw blond with a lightly peppered finish.
Product Details
NHL 3.5 Lime Mortar

Mosswood Gold (25kg)
- Fine
- Blond
Traditional lime mortar with a fine texture and straw blond, pastel appearance.
Product Details

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NHL stands for
Natural Hydraulic Lime.

There are three Hydraulic Lime Mortar options; NHL 2, NHL 3.5 and NHL 5. The number relates to its compressive strength in N/mm² (Newtons per square millimetre).

How Much Mortar Do I Need?
Estimate with a mortar calculator:

Pointing Calculator
Estimate mortar quantity for repointing brick walls or stonework.

Mortar Calculator
Estimate mortar quantity for laying bricks, blocks or stone (uniform masonry units).

The Lime Mortar Guide is a comprehensive guide to lime mortar, what it is, why you'd need it and how to use it.

Hydraulic Lime, Which NHL?
Hydraulic lime is available in three grades, here's why and how it works.

Hydraulic Lime, Practical Advantages
The ancient, natural building material that's ideal for the modern builder.

Hydraulic vs. Non-Hydraulic Lime Mortar
Decide which of the two basic types of traditional lime mortar is most suitable.

The Benefits of Lime
Why traditional lime? Recent insights reveal huge advantages of traditional lime.

Lime Mortar
- Lime Mortar
  The complete range of lime mortars, tools and accessories.
- Hydraulic Lime Mortar
  Traditional mortar with the practical benefits of a modern mortar.
- Lime Mortar (Non-Hydraulic)
  Also known as "lime putty mortar", extremely soft and slow setting.
- Popular Lime Mortar Mixes
- Fox Cragg Oatmeal, medium coarse, archetypal lime mortar.
- Mosswood Gold Pastel, straw blond, fine texture.
- See a comprehensive range of lime mortar mixes in the colour chart.
Conserv® Lime Mortars are made in North Yorkshire, United Kingdom

Engineered to BS EN 998-2:2016 specification, these products are CE certified and meet the CPR (Construction Products Regulations) 2013
Lime Plaster
- Lime Plaster
  The complete range, solutions for any lime plastering project.
- Hydraulic Lime Plaster
  Speed and simplicity, ideal for plastering large, flat vertical areas.
- Lime Plaster (Non-Hydraulic)
  Sticky and slow setting, best suited to laths, ceilings and patching.
- Lime Plastering Equipment
- Laths Traditional timber plastering laths.
- Natural Goat Hair Cashmere goat hair, wintered outdoors.
Conserv® Lime Plasters
Made in United Kingdom

Engineered to
BS EN 998-1:2016, CE certified
Lime Render
- Lime Render
  Natural, breathable coatings for external areas.
- Hydraulic Lime Render
  Traditional lime render, hydraulic setting, faster curing.
- Lime Render (Non-Hydraulic)
  Natural lime render, sticky and slow setting.
- Popular Lime Renders
- Base Coat Hydraulic lime render base coat / undercoat for scratch coat and float coat.
- Finish Coat - Elm Cragg Hydraulic lime render finish, neutral appearance.
Conserv® Lime Renders are made in the United Kingdom

See a full range in the lime render colour chart.
Lime
- Lime
  The best prices on natural lime in large or small quantities.
- NHL: Natural Hydraulic Lime
  Powdered hydraulic lime, stronger and faster setting.
- Lime Putty
  Non-hydraulic lime putty, soft and slow setting.
- Secil NHL 3.5 - Natural Hydraulic Lime Secil NHL 3.5 (Singleton Birch) is a dry powdered hydraulic lime for general building.
- Secil NHL 2 - Natural Hydraulic Lime Secil NHL 2 (Singleton Birch) is suitable for internal building work and lime plaster.
- See all Secil Natural Hydraulic Lime
- Tarmac Limelite NHL 3.5 Tarmac / Blue Circle Limelite products contain no additives, mineral additions or Portland cement.
- Tarmac Limelite Lime Putty Limelite Lime Putty is typically used for historic and traditional building repair and conservation.
- See all Tarmac / Blue Circle Lime
Breathable Paint
- Breathable Paint
  A range of traditional coatings and modern breathable paints.
- Interior Paint
  Interior paint for lime plaster.
- Exterior Paint
  Masonry paint for lime render.
- Conserv® Lime Wash
- - Lime Wash Traditional, natural and supremely breathable masonry coating.
    
    Hydraulic Lime Wash Durable lime wash for interiors and exteriors, lasts up to twice as long.
- Stockists of breathable paint from leading manufacturers
- - KEIM Mineral Paint
More Products
- Stone Repair Mortar Ethical stone repair solution. This mortar is sympathetic to surrounding masonry. Made to British Standards specification for historic stone masonry repair.
- Stone Consolidant Namurian™ Rock is a liquid stone consolidant, it makes soft, crumbling natural stone hard again.
- Stone Cleaner A range of stone and masonry cleaners.
  - Namurian™ Pro Clean General purpose stone and masonry cleaner.
  - Namurian™ XS4 Effortlessly removes moss, mould, mildew and lichen.
- Stone Sealer Breathable stone and masonry sealers.
  - Namurian™ Stain Free Stone and masonry sealer with satin finish.
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