Introducing Graphenstone Siena: A Modern Limewash for Contemporary Living

At Celtic Sustainables, we're always excited when a new product arrives that genuinely combines sustainability, performance, and beautiful design. That's why we're delighted to introduce Graphenstone Siena, a new decorative limewash that brings the timeless beauty of traditional lime finishes into modern homes and commercial interiors.

Launching in June 2026, Siena is already generating significant interest amongst architects, interior designers, heritage specialists, and homeowners looking for a natural, characterful finish that doesn't compromise on durability.

The image above features Siena in Chalky Grey.

Why Has Limewash Become So Popular?

Over the last few years, limewash has experienced a remarkable resurgence in popularity. While traditional limewash has been used for centuries, today's homeowners are increasingly drawn to its soft, organic appearance and ability to create depth and movement across a surface.

Unlike conventional emulsion paints, which produce a uniform flat finish, limewash interacts with light to create subtle tonal variations and texture. The result is a finish that feels warm, natural, and full of character.

From contemporary minimalist interiors to period cottages and modern commercial spaces, limewash has become a favourite amongst designers seeking to create calm, inviting environments with a handcrafted aesthetic.

Meet Siena: Graphenstone's Decorative Limewash

Graphenstone Siena has been developed to capture the authentic beauty of traditional limewash while overcoming many of the practical limitations associated with decorative lime finishes.

Available in 24 stunning Colours of the Earth shades, along with a further 20 colours from the English Heritage Colour Collection, Siena offers a versatile palette inspired by the natural world and historic interiors.

Designed to create soft, textured walls with depth and character, Siena's warm, earthy tones and timeless finish make it the perfect choice for transforming living spaces, bedrooms, hallways, and commercial interiors alike.

The result is a finish that combines natural beauty with modern performance.

The image above features Siena in Linen.

A Timeless Finish for Modern Homes

One of Siena's greatest strengths is its versatility.

The soft movement and subtle variation created by the limewash effect add depth and interest to interiors without overwhelming a space. Whether used in a living room, bedroom, hallway, office, restaurant, or retail environment, Siena creates a sophisticated finish that feels both contemporary and timeless.

Natural lime-based finishes also complement many popular interior design styles, including:

• Scandinavian interiors
• Modern farmhouse designs
• Mediterranean-inspired homes
• Heritage renovations
• Contemporary minimalist spaces
• Biophilic and wellness-focused interiors

The finish works particularly well alongside natural materials such as timber, stone, linen, clay plaster, and exposed brick.

Outstanding Coverage

With a coverage of approximately 5–6m² per litre over two coats, Siena offers nearly double the coverage of many comparable decorative limewash effect products currently available on the market.

The image above features Siena in Strawy.

Durable Enough for Everyday Living

Traditionally, decorative limewash finishes have often been associated with delicate surfaces requiring careful treatment.

Graphenstone Siena challenges that perception by achieving a Class 1 Wet Scrub Rating, the highest classification available under European testing standards.

This means Siena provides exceptional durability for an authentic limewash effect finish, making it suitable for busy homes and commercial interiors where long-term performance is important.

For comparison, many competing limewash products achieve only a Class 2 rating.

Sustainability at Its Core

As with all Graphenstone products, sustainability sits at the heart of Siena's development.

The product carries a number of respected environmental certifications, including:

• Environmental Product Declaration (EPD)
• Cradle to Cradle Gold Certification
• Low VOC compliance

These credentials make Siena an excellent choice for environmentally conscious homeowners, architects, and developers seeking to reduce the environmental impact of their projects.

Healthier Indoor Spaces

Modern homeowners are becoming increasingly aware of the impact that building materials can have on indoor air quality.

The image above features Siena in Cinder.

By choosing low VOC, mineral-based finishes, it is possible to reduce the introduction of unnecessary chemicals into the home while creating healthier living environments.

This makes Siena particularly attractive for bedrooms, living spaces, home offices, and wellness-focused interior designs.

Limewash Effect Colours

Siena is available in:

• 24 Earth Collection colours
• Plus a further 20 colours from the English Heritage Card (Any colour with the letter ‘L’ under can be done in Siena.)

Is Siena Right for Your Project?

If you're looking for an interior finish that combines:

✓ Timeless character

✓ Beautiful depth and movement

✓ Excellent durability

✓ Outstanding coverage

✓ Low VOC credentials

✓ Industry-leading environmental certifications

✓ A natural, handcrafted aesthetic

Then Graphenstone Siena could be the perfect choice.

Whether you're renovating a period property, designing a contemporary home, or specifying materials for a commercial project, Siena offers an elegant and sustainable alternative to conventional decorative paints.

Discover Siena at Celtic Sustainables

We're excited to bring Graphenstone Siena to our customers and look forward to seeing how it transforms homes and interiors across the UK.

If you'd like advice on colours, application techniques, or whether Siena is suitable for your project, our team is always happy to help.

Get in touch with Celtic Sustainables today to learn more about Graphenstone Siena and discover the beauty of modern limewash.