Summary
A ready mixed natural cement and natural hydraulic lime mortar for exposed and submerged freshwater and saltwater applications below the water level with a refined buff-tan coloured finish.
A ready mixed natural cement and natural hydraulic lime mortar for exposed and submerged freshwater and saltwater applications below the water level with a refined buff-tan coloured finish.
Application
Suitable for external use, where the binder strength is appropriate for the host background or surface.
Relevant for marine building and pointing work applications, including freshwater and saltwater environments above and below the water level, including tidal environments which require a speedy set to reduce washout.
For a mortar which contains no Prompt Natural Cement, explore Marine L4. Appropriate for various project types, including conservation and renovation.
A 25kg bag will produce approximately 14.5 litres of mortar and fill roughly 1.5m² of joint at a depth of 10mm. The width and depth of the joint will influence this estimation. On-site trials are advised for the best yield indication for your specific project.
Supplied in 25kg polythene-lined and colour and batch-coded paper bags for easy identification on-site. Palletised for ease of transport, storage, and handling. FIBC tonne bags are also available.
Suitable for external use, where the binder strength is appropriate for the host background or surface.
Relevant for marine building and pointing work applications, including freshwater and saltwater environments above and below the water level, including tidal environments which require a speedy set to reduce washout.
For a mortar which contains no Prompt Natural Cement, explore Marine L4. Appropriate for various project types, including conservation and renovation.
A 25kg bag will produce approximately 14.5 litres of mortar and fill roughly 1.5m² of joint at a depth of 10mm. The width and depth of the joint will influence this estimation. On-site trials are advised for the best yield indication for your specific project.
Supplied in 25kg polythene-lined and colour and batch-coded paper bags for easy identification on-site. Palletised for ease of transport, storage, and handling. FIBC tonne bags are also available.
Description
Cornerstone Marine LP6 and Marine LP8 are dry, ready mixed natural cement and natural hydraulic lime mortars for marine building and pointing work of water-bearing masonry. Available in the colour buff-tan.
Engineered with precision, using Prompt Natural Cement, Saint-Astier® natural hydraulic lime, and natural sands to create a high-performance mortar for freshwater and saltwater applications. Available as standard with Prompt Natural Cement and Saint-Astier® NHL5.
Well-suited for submerged fresh or saltwater applications that require an accelerated fast set to reduce the risk of tidal washout.
Features and benefits:
- Sympathetic for weaker substrates
- Roughly 74 minutes of working time at 17°C for LP6
- Roughly 72 minutes of working time at 17°C for LP8
- Reduced risk of washout in tidal zones
- Features an attractive buff-tan natural finish
- Contains no Portland Cement
- Contains no synthetic polymers
Our Marine Range
For water-bearing masonry
Our ready-mixed natural hydraulic lime or natural cement mortars are expertly engineered for building and pointing water-bearing masonry above or below the water line.
With various strengths, setting times, and degrees of water resistance or waterproofing, this range allows for the right balance of durability, workability, and washout resistance.
Other Marine products include:
- Marine L4
- Marine P10 Mortar
- Marine P15 Mortar
- Marine P30 Mortar
- Marine P50 Mortar
- Marine P60 Mortar
View the range on our website
Cornerstone Marine LP6 and Marine LP8 are dry, ready mixed natural cement and natural hydraulic lime mortars for marine building and pointing work of water-bearing masonry. Available in the colour buff-tan.
Engineered with precision, using Prompt Natural Cement, Saint-Astier® natural hydraulic lime, and natural sands to create a high-performance mortar for freshwater and saltwater applications. Available as standard with Prompt Natural Cement and Saint-Astier® NHL5.
Well-suited for submerged fresh or saltwater applications that require an accelerated fast set to reduce the risk of tidal washout.
Features and benefits:
- Sympathetic for weaker substrates
- Roughly 74 minutes of working time at 17°C for LP6
- Roughly 72 minutes of working time at 17°C for LP8
- Reduced risk of washout in tidal zones
- Features an attractive buff-tan natural finish
- Contains no Portland Cement
- Contains no synthetic polymers
Our Marine Range
For water-bearing masonry
Our ready-mixed natural hydraulic lime or natural cement mortars are expertly engineered for building and pointing water-bearing masonry above or below the water line.
With various strengths, setting times, and degrees of water resistance or waterproofing, this range allows for the right balance of durability, workability, and washout resistance.
Other Marine products include:
- Marine L4
- Marine P10 Mortar
- Marine P15 Mortar
- Marine P30 Mortar
- Marine P50 Mortar
- Marine P60 Mortar
View the range on our website
Product certifications
- CE Marking CE Mark Mortar - Marine LP6 Coarse Mortar
- CE Marking CE Mark Mortar - Marine LP8 Coarse Mortar
- CE Marking CE Mark Mortar - Marine LP6 Coarse Mortar
- CE Marking CE Mark Mortar - Marine LP8 Coarse Mortar
Color
Beige
Beige
Finish
Textured
Textured
Material
Hydraulic lime, Cement, Sand
Hydraulic lime, Cement, Sand
Shape
Formless
Formless
Length
Bespoke
Bespoke
Width
Bespoke
Bespoke
Height
Bespoke
Bespoke
Specification
Classification data
Mortar type
Batched dry natural cement:naturally hydraulic lime:sand.
Batched dry natural cement:naturally hydraulic lime:sand.
Mix
NHL 5 and natural cement.
NHL 5 and natural cement.
Colour
Iron/ tan.
Iron/ tan.
Additional properties
Aggregate
5 mm down washed, sharp flint sand.
5 mm down washed, sharp flint sand.
Flexural strength
0.1 N mm² (at 24 hours); 0.5 N mm² (at 7 days); 0.7 N mm² (at 28 days).
0.1 N mm² (at 24 hours); 0.5 N mm² (at 7 days); 0.8 N mm² (at 28 days).
Typical compressive strength
1.2 N mm² (at 24 hours); 5.4 N mm² (at 7 days); 7.9 N mm² (at 28 days).
1.6 N mm² (at 24 hours); 6.6 N mm² (at 7 days); 10.0 N mm² (at 28 days).
Water absorption
1.4 kg/m².min⁰·⁵.
0.93 kg/m².min⁰·⁵.
Reaction to fire classification
Class A1.
Class A1.
Sustainability data
Contains Red List materials
No
No
Country of product manufacture
United Kingdom
United Kingdom
Material
Hydraulic lime, Cement, Sand
Hydraulic lime, Cement, Sand