Ultramarine Blue is a synthetic, powdered pigment that works well as a tint for lime-based wall finishes. Once mixed, limewash tinted with ultramarine blue should be used promptly, as it can fade if kept in a damp environment. After drying, the limewash's colour will stabilise, but keep in mind that tinted limewash is not UV resistant and is best suited for indoor applications.

Due to the natural properties of limewash, tinted finishes tend to dry lighter than their initial appearance. We recommend conducting test patches before committing to the full application.

Product Details

• Synthetic pigment with a natural base
• Not resistant to UV exposure
• Colour stable in lime and cement environments
• Non-toxic and safe to handle

The following weights correspond to specific volumes of Ultramarine Blue (product code 284):

• 250ml: 130g
• 1 litre: 520g
• 10 litres: 5.2kg

Preparation & Mixing

Create a pigment slurry by dissolving the dry powder in warm water before adding to limewash. This ensures even saturation and prevents uneven colouration caused by dry pigment clumps. Once prepared, combine the slurry with limewash and mix thoroughly.

Application

A standard mix involves blending one 25kg container of mature lime putty with around 25 litres of water, producing roughly 45 litres of limewash. To maintain strength, add no more than 2 litres (about 5% by volume) of dry pigment to this mixture. Achieving the vibrant colour in the example image involved using the maximum pigment amount (5%) for a limewash with a consistency similar to single cream. Lighter shades can be obtained by reducing the pigment amount.

Feel free to blend different pigments from our range to create custom hues.

Coverage

Approximately 10 litres of limewash will cover 30 to 40 square metres per coat. For optimal results, apply 3 to 5 coats initially. Actual coverage depends on the mix thickness and the substrate surface. Thicker limewash mixtures are more prone to cracking, so consistency is key.