Frequently Asked Questions

Yes, it is possible. We've summarized the installation methods for each type of substrate, so please check the " Case Studies " section for more details.

Just like on castles and traditional storehouses, shikkui can also be applied to exterior walls. In such cases, mixing oil*1 into NURI² or applying a topcoat to areas directly exposed to rain will help it last longer. Please feel free to contact us for more details.

You can also plaster the ceiling. Since plastering the ceiling is more difficult than plastering the walls, we recommend starting with the walls.

It is made of shikkui, not diatomaceous earth, and slaked lime is its main ingredient. It does not use any chemical binders, such as synthetic resins; instead, it relies on the natural hardening power of lime to create a durable wall.

You can create beautiful patterns using readily available items like brushes and sponges—or even just the palm of your hand.

A smooth finish is the result of a craftsman’s skilled technique, and it is a challenging finish for first-time workers. We recommend starting with a patterned finish.

One characteristic of shikkui is that its color becomes lighter as it hardens. The slower the hardening is^*2, the lighter the final color will be; therefore, differences in application thickness—which result in differences in hardening time—will lead to variations in color.

The ideal thickness is about 1 to 1.5 mm, enough to ensure the base layer doesn’t show through. If you apply it too thickly, cracks may form on the surface.

Although it depends on the application thickness, we have a usage simulator on our website that makes it easy to determine the amount of NURI2 needed based on the surface area, so please feel free to use it.

It will dry within one day. After that, it wil  continue to harder^*2 thoroughly for about a week while absorbing carbon dioxide from the air, so please ensure it remains in a well-ventilated area.