Special Coarse Dark (Coarse Stuff)
Special Coarse Dark (Coarse Stuff)
Non-hydraulic lime putty ready-mixed mortars produced from 6 month mature mortar grade Chalk lime putty mixed with sands and stone-dustsnormally at a ratio of 1:2.5 or 1:3 by volume. Standard + Special + Matching mixes available.
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Special Coarse Dark (Coarse Stuff)

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Environmental Considerations
Lime Putty mortar is an environmentally sustainable product.
Shelf Life
Unlimited. Matures with age. Lime putty mortars stiffen during storage, but can be plasticised without the addition of water by thorough re-mixing.
Colour
Mortar colour is determined by the sand, stonedust or aggregate mixed with the putty.
Observations
The use of stone and brick repair mortars is a skilled operation normally undertaken by an experienced conservator. Non-hydraulic lime mortars do not perform as modern hydraulic lime and cement, and set only by reaction with atmospheric carbon dioxide in the presence of moisture. This ‘carbonation’ is a slow process and control of the drying and curing process by ‘tending’ and protecting is crucial to success and long-term performance. Protections are essential. Do not use below a temperature of 5°C or above 25°C. Do not use if there is risk of frost.
Availability
25kg Heat-sealed bags and 15 litre tubs. Mixed to order.