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Kiilto OT Oikaisutasoite 5–20 (40) mm

Fiber-reinforced smoothing and filling plaster with good filling properties for wall surfaces in dry and wet areas. Layer thickness in holes 5–40 mm, in over plastering 5–20 mm. Suitable also for outdoor use, if coated. Cementitious.

Special features

  • cementitious binder, fibre reinforced
  • dry and wet areas
  • suitable for outdoor use
  • drying time 1-3 d
  • partial levelling 5–40 mm, over plastering 5–20 mm
  • coverage 1,6 kg/m²/mm


Kiilto OT is a wall plaster for smoothing rock material wall surfaces. The finished surface can be painted or tiled. If a smoother surface is needed, for example under waterproofing membrane, the surface can be over plastered with Kiilto’s finer wall plasters for wet areas, or by floating with a steel trowel.


1 mm layer/m² solid matter weights approx. 1.6 kg

Package Size

EAN Code

20 kg 6411513720202
Package Size 20 kg
EAN Code 6411513720202


Polymer-cement-sand -based powder



Bond strength

> 0,5 MPa (EN 998-1)

Compression strength

class CSIV (EN 998-1)

Mixing ratio

4.8-5.2 l water / 20 kg bag

Curing rate

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

Working time

2–3 hours (+18 °C)

Working conditions

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

Package sizes

20 kg bag

Substrate humidity

concrete < 90 % RH


1 mm layer/m² solid matter weights approx. 1.6 kg

Layer thickness

5–40 mm, in over plastering 5–20 mm

Max. grain size

3 mm


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

Instructions for use

The surfaces to be plastered must be sufficiently solid, clean and free from dust. Dry surfaces must be lightly moistened prior to plastering. 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 OT 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 manually by using a steel trowel.

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

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