Lime PuttySee our ranges & prices
Limestone (Calcium Carbonate – CaCO3) is burnt in a kiln giving off Carbon Dioxide (CO2) gas and forming Calcium Oxide (CaO) which is commonly known as Quicklime or Lumplime. It needs to be burnt at 900-1100°C.
The Burnt Lime or Quicklime is then combined with water (slaked) as quickly as possible. Combining Quicklime (CaO) and water (H20) produces Calcium Hydroxide (Ca(OH)2 – slaked lime and heat. It is combined with an excess of water which produces a putty. It is also known as non-hydraulic lime because it requires exposure to air in order to carbonate and does not set under water.
Lime putty is suitable for :
i) Blending in the correct ratios with appropriate sands to produce plasters and mortars.
ii) Diluting with water to produce limewash or lime water.
This lime is regarded as the most appropriate lime for old buildings where maximum permeability and flexibility is required especially suitable for pointing brick and soft stone work and is highly suitable for nearly all internal plastering and rendering onto cob, straw etc.