Clay based natural building materials such as clay plasters, clay boards/panels and earth blocks have common characteristics; they all store heat and moisture then release equally and slowly to the interior. Though the indoor humidity stays in ideal balance. Natural clay building products protect the building from damp, mold, allergen formation. Plus these building materials, thanks to their heat storage capacity, help keep interior cool in summer and warm in winter. 


Okil® clay plasters which we started the production in 2019, are the product line of Okil brand. They are produced with local clay, sand and natural fiber sources. Okil® Clay plasters are sold as dry mix in 25 kg package. Okil® Clay plasters offer quality standard and practicality in the construction process besides many advantages related to their characteristics.


the decor clay plaster allows you to obtain smooth, dust-free and high-strength surfaces thanks to the light colored special sieved clay, quartz and natural binders. When it is applied as a final layer, it is sufficient to apply 0.2-0.5cm thicknesses.


the decor clay plaster allows you to obtain smooth, dust-free and high-strength surfaces thanks to the light colored special sieved clay, quartz and natural binders. When it is applied as a final layer, it is sufficient to apply 0.2-0.5cm thicknesses.


through a mixture of granulated clay, quartz and natural binders, Fine clay plaster provides you with smooth and durable surfaces. It is recommended to use 0.5-2cm thickness and to apply a decorative plaster or clay paint on top of it, since the fine plaster might slightly dust.


the binding of the rough plaster is high due to the effects of the clay. The high content of hemp fiber in the plaster gives additional insulation properties. Recommended application thickness is 2-3 cm. If different material compositions are present on the façade, use of mesh is recommended.




conditions of the environment

Application in strong windy conditions must be avoided. Taking precautions against rapid drying is advised.

What to be careful of while mixing the dry clay blend

The dry clay blend including micronized quartz sands, needs to be mixed in an airy space. While mixing the blend, anybody close to it, is recommended to wear a mask.

at the beginning

The application surface must be cleaned from dust and and mold oils

use of water

25 kg (bag) OKiL Ready clay plaster is poured into a mixing container in a dry state. Add small amounts of water until you reach the desired application consistency and mix until there is no lump.


let the mortar rest for 30 minutes.

preparing the wall surface

desired application surface must be wetted first

the use of gauge

To obtain a smooth surface, the surface must be gauged.

use of plaster net

plaster mesh should be applied at the joints of different materials.


after the application, the surface should be moistened periodically for 1-2 days considering the weather conditions.

after the application

fter the applications, the Okil clay plaster (especially filling plaster) must be left to dry minimum for 1 week

second layer

after the application of ‘’Okil filling plaster’’ ; plaster mesh must be used before applying second coat applications like fine plaster.


Okil, is the representative of Lemix® Clay Panel brand in Turkey since 2019. Clay panels support human an environment health thanks to their nature and performances improving indoor climate and ensuring energy efficiency of the buildings. Plus they can be integrated to several building types in a practical way.


Lemix® Clay panels are made of natural, locally sources raw materials. They are sustainable as they are compostable and 100% recyclable. With the precision and quality of the first industrially produced clay panel (often also referred to as “clay building slab”) Lemix® is a modern clay panel for interior construction and can be used in the same way as conventional plasterboard. These panels are capable to store heat in winter, protects from heat in summer. So they support energy efficiency of the building. 


Lemix® clay panels are ideal dry construction solutions for interior construction in timber and masonry houses and for the renovation (also of listed half-timbered houses, for example), they ensure shorter assembly times by reducing the need for complex leveling layers or delicate bonding points. The panels can be used easily for bathrooms and kitchens with the condition to be kept behind ceramic or marble cover or being sprayed.

The moisture content of clay is very low around 0.4 to 6 %. So it also affects the adjoint materials. If the other organic materials like wood are surrounded with clay/earth, they are purified from moisture and stay dry. There is no risk of mold formation or infestation.


Lemix® clay panels (previously referred to as “clay building slabs”, by the way) can be easily cut and shaped to size. Using a jigsaw or a portable circular saw or also using an angle grinder and suction hood. Clay panels are always arranged in a bonding pattern with an offset.

Even with electrical/HVAC installations there are no big differences, they can be placed behind the clay panels as usual. For holes, as are required for cavity sockets, you use a compass saw. For attachment of light-weight objects, the use of cavity dowels is recommended. For heavier objects, such as kitchen cabinets, substructures are required. As is usually the case in drywall construction.


Natureplus certificate

Lemix is the first clay panel certified according ® to natureplus and meets all the technical requirements of the LEHM e.V. ® umbrella association. Lemix of course also complies with the recently published DIN 18948 for clay boards. The ideal natural construction material for ecological drywall construction.

Thickness & measures

Lemix® clay panel standard measure is 62cm x 125cm, there are two thickness option: 22mm and 16mm. The area one panel cover is: 0,781 m2 / panel

Weight per m2 and pieces

16mm thick panel weighs 18 kg, 22mm thick panel weighs 25 kg . Weight / M2 for 16mm thick panel is 23 kg, for 22mm thick panel is: 32 kg’dır.

Surface hardness, surface and bending tensile strength

surface hardness : ≤ 15 mm, bending tensile strength: ≥ 0,8 N/mm² , surface tensile strength: ≥ 0,1 N/mm²

Thermal conductivity and heat capacity

thermal conductivity: λ = 0,353 W/mK, Specific heat capacity : C p approx 1,1 J/kgK

Building material class, bulk density

 Bulk density: 1450 kg/m3 and a1 (non flammable) according to DIN EN 13501-1:2010-01

Content and structure

content: earth and sawdust. structure: With jute fabric backing

Attachment and fixing

fastening and attachment: gluing, stapling, screwig. Fixing material: Disc head screws, corrosion-protected (phosphatic) screws with retaining plates, broad back staples

Acoustic insulation

the test made according to European Union Standard (DIN EN ISO 10140-2) showed that when  11cm wall is constructed with a wooden frame and 22mm clay panels are used on both face of the wall with  6cm inner whole was insulated, the sound insulation of LEMIX® clay panels have a value of 51 dB. Drywalls have lower values according to similar tests. 11.5 cm thick brick walls (with density: 1.0 kg / dm3 ) have 45 dB sound insulation value.


Earth block is produced from past to present with a mix of clay soil and straw by pressing in a mold and dried under the sun. Earth blocks can be procured without using artificial heat or energy and they are not going under a chemical reaction. So their embedded energy and carbon footprint are very low, they can be %100 recyclable and biodegradable. Plus by means of their natural clay content earth blocks affects positively the indoor air quality and they have high level heat storage capacity.


Material content and production

Clay soil and straw are mixed with water and this mix is poured to the mold. When this mix is dried under the sun, it is removed from the mold. The content of straw increases the stability and heat insulation capacity of the earthen block.

Measures & weights
  1. Width: 10cm, lenght: 22cm, height: 6cm, weight: 2,3 kg. 
  2. Width: 15cm, lenght: 25cm, height: 7cm, weight: 4,2 kg

Delivery amount and weights
  1. 750 pieces of blocks / Palette, weight: 1755 kg
  2. 300 pieces of blocks / Palette, weight: 1290 kg
Application suggestions
  1. Earth blocks are suggested to be used as filling material in walls of wooden frame or reinforced concrete buildings.
  2. Clay mortar use is suggested during the construction of the mud brick wall.
  3. Because the earth block water repellency is low, it is not recommended to be used on the exterior wall. On the interior wall, according to the preferences earth blocks can be used without a plaster cover as decorative surface or it can be covered with a fine clay plaster.