Limewash with Tallow is an exterior grade limewash used for the decoration of lime renders, porous building materials, and previously tallow-limewashed surfaces in the more exposed locations. It is less permeable than both Pure Limewash (RJ3.01) and Casein Limewash (RJ3.02). When added, some of the tallow reacts with the alkaline lime to form an insoluble calcium soap; the rest of the fat is dispersed by this soap and binds the mixture together.
Limewash with Tallow should be applied to damp surfaces. Sample trials should always be carried out to assess compatibility with substrate. Newly applied exterior Limewash must be fully protected from rain, wind, direct sunlight, frost etc until it has cured and carbonated (normally about 4 weeks). See our technical advice here.