Graphenstone Siena

Prepare the surface before applying Graphenstone Siena. The substrate should be sound, clean and dry, with any existing paint firmly adhered. Carry out a test area to check the preparation and the finished limewash effect.

If working on a surface painted before the 1960s, take precautions before sanding or removing old coatings, as they may contain lead.

• Clean away dust, dirt, grease, wax, oil and other surface contamination that could affect adhesion
• Remove any mould, algae or fungal growth with a suitable fungicidal cleaner, such as Sandtex Fungicidal Wash, following the manufacturer's instructions and allow the surface to dry fully
• Scrape away loose or flaking paint, then lightly sand shiny surfaces and remove any sanding dust
• Rake out cracks and repair damaged areas with a suitable, compatible filler, like Prestonett Ready Mixed Interior and Exterior Filler
• Allow new mineral surfaces to cure for at least 28 days before painting
• On plasterboard or filled areas, spot prime and/or apply a mist coat of Graphenstone NaturColor Interior Matt or BaseCoat as required
• Prime absorbent surfaces with one coat of Graphenstone Ambient Primer L42
• Prime wood, metal and other non-porous surfaces withGraphenstone Four2Four
• Protect adjacent glass, timber and other surfaces that are not being painted

Always apply a small test area first to check the colour, surface suitability and limewash effect. Follow the manufacturer's instructions and wear gloves and eye protection when handling Siena, as the wet paint is alkaline.

• Apply when the air and surface temperatures are between 7°C and 35°C and relative humidity is no higher than 80%. Avoid direct sunlight and surfaces heated by the sun
• Stir the paint thoroughly before and during use. If using more than one container of the same colour, mix them together to help maintain a consistent colour
• For a limewash effect, dilute Siena with up to 5% clean water and stir thoroughly before application
• Apply two coats using a limewash brush, mitt or sponge. Work with soft, rounded movements or overlapping strokes in different directions to create natural tonal variation
• Avoid applying the paint too thickly, as this can extend curing times and cause fine cracks
• Allow 2-4 hours between coats at 25°C and 60% relative humidity. Cooler or more humid conditions may increase the drying time
• Clean brushes and other tools with warm water after use

Siena can look patchy while the lime cures. Allow 3-4 days for its opacity and colour to develop before deciding whether any areas need attention.

Allow Graphenstone Siena to dry for approximately 24 hours. The limewash effect and full opacity will continue to develop over the next 3-4 days, so areas that initially look patchy may even out as the paint cures.

• Protect the painted surface from water, splashes and condensation for the first 4-5 days
• Avoid rubbing or cleaning the surface during the approximately 30-day curing period
• Once fully cured, gently clean marks with a soft, damp cloth. Test an inconspicuous area first and avoid abrasive cleaning
• Store leftover paint tightly sealed in its original container, in a cool, dry place away from direct sunlight and freezing temperatures

For damp rooms, Graphenstone recommends a suitable protective finish to help reduce water and dirt absorption. Siena should not be used on surfaces in permanent contact with water.

Frequently Asked Questions

What sort of finish does Graphenstone Siena create?
Siena creates a decorative limewash effect with soft variations in tone. The final appearance depends on the surface and the direction and pressure of the application strokes.

What surfaces can Siena be applied to?
It is suitable for properly prepared interior plaster, plasterboard, drywall, brick, prefabricated boards and previously painted surfaces. Wood, metal and other non-porous surfaces require Graphenstone Four2Four primer.

Does Siena need a primer?
This depends on the surface. Graphenstone specifies Ambient Primer for absorbent substrates and Four2Four for wood, metal and non-porous surfaces. Plasterboard or filled areas may need spot priming and/or a mist coat of NaturColor or BaseCoat.

How many coats are needed?
Apply two coats for a limewash effect, allowing 2-4 hours between coats under the conditions stated in the technical data sheet. Coverage is approximately 10-12 m² per litre per coat, depending on the surface and application method.

Can Siena be applied with a roller or spray gun?
For the decorative limewash effect, Graphenstone specifies a limewash brush, applicator mitt or sponge. A roller or airless sprayer is listed for its separate brick whitewash technique.

When can the painted surface be cleaned?
Siena takes approximately 30 days to fully cure. Avoid rubbing or cleaning it during this period. Once fully cured, it has a Class 1 wet scrub rating and can be cleaned gently.

Can Siena be used in kitchens and bathrooms?
It can be used in damp rooms, but protect the fresh paint from water and condensation during its initial cure. Graphenstone recommends a suitable protective finish to reduce water and dirt absorption. Do not use Siena on surfaces in permanent contact with water.