Clay paint for natural interior walls

Clay paint is not as abrasion-resistant or water-resistant as many emulsion paints. It is primarily suitable for interior spaces and should not be used in areas subject to constant moisture or heavy splashing. Furthermore, it requires a suitable, sound substrate and is usually combined with vapor-permeable primers or wall systems.

The substrate should be clean, dry, structurally sound, dust-free, and uniformly absorbent. Highly absorbent or very smooth surfaces usually require a suitable primer. Clay paint should be stirred thoroughly, applied evenly, and used at normal room temperature. Two coats are often advisable to achieve full coverage..

Clay paint is suitable for many mineral interior substrates, such as clay plaster, lime plaster, gypsum plaster, sound existing paintwork, and plasterboard or gypsum fiberboard. It is important that the surface is firm, clean, and free of separating layers. Clay paint can be applied directly to clay plaster provided the plaster is completely dry, free of dust, and has uniform absorbency.

Thanks to its breathable, moisture-regulating surface, clay paint can contribute to a more balanced indoor climate. However, it is not a mold remover and does not solve structural moisture problems. Mold usually develops due to persistently high humidity, thermal bridges, or poor ventilation. The root cause should always be addressed first.

The best clay paint depends on the substrate, the desired color, and the level of wear and tear. High-quality clay paints are breathable, low-emission, offer good coverage, and are suitable for interior mineral surfaces. For healthy indoor living environments, products made from natural raw materials that provide clear technical specifications for application are particularly advisable.

Depending on the product, clay paint can be tinted using suitable pigments. It is important to adhere to the recommended pigment quantities to avoid compromising opacity, adhesion, or workability. While it is possible to make clay paint yourself, this often results in inconsistent quality. Ready-made clay paints generally offer greater ease of use, reliability, and consistent results.

Clay paint on a wall can last for generations, provided the substrate has been properly prepared and the surface is not subjected to excessive moisture or abrasion. The shelf life of opened or mixed clay paint varies depending on the product; however, powdered products generally have an indefinite shelf life when stored in dry conditions.

Genuine clay paint is considered a healthy choice for walls because it is breathable, solvent-free, and based on mineral or natural raw materials. It can absorb and release moisture, thereby helping to maintain a pleasant indoor climate. For allergy sufferers or sensitive individuals, it is worth examining the exact composition.

Clay paint is typically applied using a brush, roller, or block brush. It should be stirred thoroughly before application. Depending on the product, the first coat may be slightly diluted, while the second coat usually provides the desired coverage. To avoid visible overlap marks, the paint should be applied evenly using a "wet-on-wet" technique.

Clay paint is often more expensive than standard emulsion paint, but it offers environmental benefits and improves the indoor climate. The exact price depends on the container size, coverage, color, and quality. When comparing products, one should consider not only the price per liter but also the opacity, the number of coats required, and the necessary surface preparation.