A fibre-reinforced wall plaster for rock material wall surfaces, also in wet areas. For interior and exterior areas. Suitable to be used with a reinforcing mesh. Also suitable for socles and exterior walls, when coated. Partial plastering 3-30 mm, over plastering 3-15 mm. Cementitious.

Special features

  • fibre-reinforced, sprayable
  • suitable for socle levellings and to be used with a reinforcing mesh in rock walls
  • coverage 1.5 kg/m²/mm
  • coatable: 1-3 d
  • interior areas; also suitable for exterior areas, when coated





Kiilto KL is a fibre plaster for rock material wall surfaces. Suitable for levelling walls before waterproofing and tiling and installing reinforcing mesh to block walls. When coated suitable also for exterior walls and socles.

Package Size EAN Code
20 kg 6411512299204
Bond strength

> 0,5 MPa (EN 998-1)



Compression strength

CSIV (EN 998-1)


1 mm layer/m² solid matter weights approx. 1.5 kg

Curing rate

approx. 1-3 d (+18 °C) (depending on layer thickness and prevailing conditions)

Layer thickness

over plastering 3–10 mm, partial levelling 3–15 mm

Max. grain size

1.5 mm

Mixing ratio

4.2-4.8 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-sand -based powder

Working conditions

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

Working time

approx. 2-3 hours (+18 °C)

Instructions for use

The surfaces to be plastered must be sufficiently 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 has sufficiently cured. If needed, the surface should be carefully sanded and cleaned before applying a new plaster coat. Protect the surface from direct sunlight and windy.

Strew Kiilto KL 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 Kiilto KL by spraying or by vigorously pressing it onto the substrate by hand. Sprayed surface can be levelled, for example, with a steel trowel. The surface can be floated.
When using Kiilto Rappausverkko -reinforcing mesh embed it into fresh plaster. Smooth the surface with a steel trowel to leave the mesh in the middle of the plaster layer. After the layer has cured, the second layer can be applied. In dry conditions, curing of the layer can be speeded up by spraying it with water.

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 www.kiilto.com.

M1 emission classification for building material
CE marking
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