Kiilto SK
Plaster for wet rooms

A plaster for levelling walls and ceilings in wet areas. Particularly for straightening concrete and block walls prior to waterproofing and tiling. Partial plastering 1-10 mm, over plastering 1-3 mm. When coated, also suitable for exterior applications. Cementitious.

Special features

  • long working time
  • for finishing the substrate before waterproofing
  • coverage 1.3 kg/m²/mm
  • coatable:  3 mm/1 d, 10 mm/3 d
  • for interior areas; also suitable for exterior areas, when coated




Kiilto SK is a wall plaster for interior walls and ceilings. Suitable for plastering various rock material surfaces and gypsum boards. The finished surface can be tiled or waterproofed with Kiilto waterproofing membrane. It can also be over plastered with other Kiilto wall plasters depending on the application. In outdoor use the finished surface must be coated.

Package Size EAN Code
20 kg 6411512154206


Compression strength

CSIV (EN 998-1)


1 mm layer/m² solid matter weights approx. 1.3 kg

Curing rate

approx. 1 d (+18 °C) (depending on layer thickness and prevailing conditions)

Layer thickness

partial levelling 1-10 mm, over plastering 1-3 mm.

Max. grain size

0.5 mm

Mixing ratio

5.0-5.5 l water / 20 kg bag

Package sizes

20 kg bag


In an unopened package max. 1 year in dry conditions.

Substrate humidity

concrete < 90 % RH


Polymer-cement-limestone -based powder

Working conditions

recommendation: +18–20 °C, lowest operating temperature +5 °C

Working time

3–4 hours (+18 °C)

Instructions for use

The surfaces to be plastered must be solid, clean and free from dust. Indoors, dry porous surfaces should be wetted with water before plastering or treated with a mixture (1:4) of water and Kiilto Pro Start Primer or Kiilto PrimerOne. A new coat should not be applied until the previous one is dry. If needed, the surface should be carefully sanded and cleaned before applying a new plaster coat.

Strew Kiilto SK powder slowly in cool (+18–20 °C), clean water constantly stirring until a smooth, even mass is formed.
Let the mix mature for approx. 10-15 min and then remix once again. Apply the plaster by hand with a steel trowel or spray with a spraying gun for plasters. Also, the sprayed coat should be levelled by hand with a steel trowel.

Additional information

The information given in this product data sheet is based on our tests and our practical knowledge. The technical data is defined in standard conditions. Variations in local working conditions and methods will affect the product performance and result. We guarantee the high quality of our products according to our Quality Management System. No liability can be accepted from incorrect use of the product or prevailing conditions, over which we have no control. Thus, we cannot be held responsible for the final result. The correct use of the product presupposes that the user has made him/herself aware of the contents of the working instructions and procedure guide, if provided.

Environment and safety

Avoid unnecessary skin contact and exposure with the fresh product, use safety gloves. Refer to material safety data sheet. For information on product and package disposal, visit