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The product

Clay casein trowel compound Claycasein. Seamless. Natural. Warm.

Claycasein is our clay casein trowel compound for seamless surfaces on floors, walls and furniture. Natural and renewable raw materials, no cement and no plastics, made in our manufactory in the Zollernalb district of Germany. The alternative to plastic-modified microcement, outside the direct wet area.

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Open kitchen with island on a seamless Claycasein clay floor in Beige 05, without cement or plastics
Recipe

What is in the clay casein trowel compound

Dry material to mix with water. Clay, quartz and mineral aggregates, plus casein (milk protein), hemp fibres and a small amount of building lime. The base colour is clay brown, and you tint the Base with up to 10 % earth and mineral pigments.

ClayQuartzCasein (milk protein)Mineral aggregatesBuilding lime, small amountHemp fibresEarth and mineral pigments, optional
  • No cement, no plastics, no PU sealant

    Natural and renewable raw materials. A natural product, not certified, with a lively cloudy character. Every trowelled surface is unique.

  • Adheres to many substrates

    Already applied on screed, concrete, wood, Fermacell, plasterboard, gypsum fibre boards, plaster, rammed earth, clay screed and, after priming, even on plastic veneer. Low-temperature underfloor heating: yes.

  • Wipeable thanks to hard oil and wax

    Impregnated with hard oil, carnauba wax emulsion and hard wax. Hard-wearing and scratch-resistant like an oiled wooden surface.

  • Sold in 3 kg, 5 kg and 10 kg

    Dry material, water addition max. 360 ml per kg, depending on the pigment. For 3 coats, count on about 1,350 g per m². Keeps for at least 1 year.

Water drops bead off an oiled and waxed Claycasein surface, untreated clay next to it
Left Claycasein, oiled and waxed: water beads off. Right the untreated clay.
Direct coating on wood with Claycasein, pencils on the trowelled furniture surface
Trowelled directly onto wood and furniture.
Adhesion test: Claycasein clay casein trowel compound on a glazed tile
Adhesion test on a glazed tile.
3 kg5 kg10 kg
Test values

Test values determined by HAWK Hildesheim

Measured on Claycasein Base, the base material without pigment, hard oil or hard wax. Claycasein is a natural product made from 100 % natural raw materials.

0.0N/mm²Flexural strengthDIN EN 1015-11
0N/mm²Compressive strengthDIN EN 1015-11
0.0N/mm²Adhesive tensile strengthDIN EN 1015-12
0.00gAbrasionDIN 18947
0.0%Drying shrinkageDIN 18947
0.00kg/m³Dry bulk densityDIN EN 1015-10; density class 1.8 and strength class SII according to DIN 18947
Adhesion test: Claycasein clay casein trowel compound on a glazed tile
Adhesion test on a glazed tile.

Flexural and compressive strengthHigh flexural strength means: the material takes up small stresses from the substrate without cracking. The compressive strength almost reaches the hardness of a standard cement levelling compound. That is why Claycasein is suitable for floors, unlike ordinary clay plaster.

Adhesion, shrinkage, abrasionThe adhesive tensile strength of 2.5 N/mm² is far above the minimum values for floor levelling compounds (often 1.0 to 1.5 N/mm²), an extremely good value. The shrinkage is normal to good for clay, which is why we trowel several thin coats of about 1 mm. The low abrasion means: no dusty surface as with pure clay.

Data sheet (PDF, German)
FAQ

Questions about the clay casein trowel compound

Our answers are based on our own trials and our customers projects. All questions on the FAQ page.

Is Claycasein certified or used in public buildings?

Claycasein is a natural product made from 100 % natural raw materials. You will find the test values from HAWK Hildesheim in the data sheet. There has been no project in a public building so far, so we cannot say anything about that yet.

Does Claycasein work in the bathroom?

In the bathroom only to a limited extent, in the direct wet area not at all. Outside of it Claycasein works well, for example on the wall behind the washbasin. Do not connect it directly to the shower tray: Claycasein must not stay damp permanently. In entrance areas it works with a dirt-trapping zone. Frequent standing water leaves marks, as on a wooden floor.

Which colours are there, is there a colour chart?

We do not have a colour chart. The colours emerge from project to project, many as our customers own creations. The base colour is clay brown, and the Base can be tinted with up to 10 % earth and mineral pigments. What has already been realised you will see on the Colours page. Depending on substrate and application the shades can deviate, so always lay a sample under on-site conditions.

Can I apply Claycasein without being a trained tradesperson?

Yes. You can do this. Many projects were trowelled by the owners themselves, without any craft training. What you need: motivation and calm. How it works: application guide step by step. During application we are happy to support you via WhatsApp. Through direct contact we keep improving the technique and the application guide. You will find some customer projects on Instagram under #clubclaycasein, maybe one near you to have a look at.

Claycasein Base as dry powder in two hands above the sack

Touch it first, then decide

The sample box holds everything for your first surface. Or ask us whether Claycasein suits your substrate.

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