Piirto Silicone resin coating

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Product description

Fescon Silicone Resin Coating Piirto is an extremely weather-resistant, highly water-resistant and durable coating for both indoor and outdoor use. It is based on the latest binding agent technology and filler packets, combined with a new type of granulates. Fescon Silicone Resin Coating Piirto provides constant finish patterns on new plaster, concrete and fibre cement surfaces, and old, well attached coatings. 

  • Water-soluble
  • Grain size 1.5 mm, 2.0 mm or 3.0 mm
  • High diffusion, CO2 permeable
  • Good weather resistance
  • Highly water-resistant
  • High endurance of mechanical stress
  • Very elastic
  • Collects almost no dirt
  • Extremely effective coverage, excellent colour brightness and light resistance
  • Extremely easy to apply
  • Alkali-resistant, hence not saponified
  • Includes an additive that prevents the formation of mould and algae
  • Large selection of colours, strong colours also included


  • Concrete surfaces
  • All plastered surfaces
  • Fibre cement boards
  • Firm old coatings
  • For outdoor and indoor use
GTIN code Product name Product number Package size
6416841760678 PIIRTO SILICONE RESIN COATING 2 MM FESCON 235 86067 25 kg
PIIRTO SILICONE RESIN COATIN HR 1 Fescon colors 50312 25 kg
PIIRTO SILICONE RESIN COATIN HR 2 other colors 50313 25 kg
Priming of concrete surfaces

Remove any poorly attached and flaking coatings and paints from concrete surfaces, for example by water sand blasting. Remove damaged concrete by chiselling, water sand blasting or milling, depending on the type and extent of the damage. Shape the cavities and clean any rusted reinforcement bars to grade St 2 or replace them with new ones. Apply Fescon Adhesive Plaster on the rebars and repair holes with Fescon Repairing Plaster. If necessary, overlay the repaired surfaces with Fescon Overlaying Plaster. Roughen the new concrete surfaces and clean them of cement paste, for example by water sand washing or steel brushing. The surface treatments can also be carried out during the element manufacturing. New concrete surfaces can be painted after a minimum of one heating season.

Priming of plaster surfaces 

Remove old poorly attached and flaking coatings and paints from plastering surfaces. Remove plaster layers that have become separated from their base, until you reach an undamaged plaster layer. Apply repair plaster in three or two layers or as surface plastering depending on the depth of the damage. Shape the structure of the surface plastering to match the original plaster surface. Take the composition of the old plasters into consideration while working. Allow places with deep plaster and new plaster surfaces to dry for 4-8 weeks before painting, depending on the conditions. When pretreating and painting bases containing asbestos, you must take the protective measures prescribed in the decisions of the government and the National Board of Labour Protection.


Mix the coating before application

Test coating

Before beginning work, carry out a test coating to ensure the correct tint.


Prime with Fescon Silicone Resin Primer MC.


Apply the plaster to the wall, covering the entire surface, using a stainless steel trowel. Float immediately using a plastic trowel or a PU float using circular motions. You can also apply the product with a sprayer (nozzle size 6-8 mm) and leave the sprayed plaster untouched. The base must be dry. In order to avoid working seams, apply the coating to continuous façade surfaces using the wet on wet principle at the same time using the same product batch. If you must switch to a new batch, you must mix the old and new batches together.  Thin if necessary with max. 2% water in order to improve workability.

During coating and drying, the air temperature must be at least + 5°C and the relative humidity no more than 80%. If the product has been stored at a low temperature, the product must be temporarily stored at a temperature of around +20°C before working. Do not work with the product in direct sunlight or in high winds. Clean tools with water.

After treatment

The fresh coating must be protected from too rapid drying, frost and rain during the work and until it has dried entirely.

Service instructions

A dirty surface can be cleaned with a pressure washer. Remove any damaged spots and repair the holes. Repaint with Fescon Silicone Resin Paint. One treatment is sufficient for a cleaned, undamaged surface. Priming with thinned Silicone Resin Paint is also needed for damaged areas from where the paint has been removed or holes have been patched.

Storage and handling of waste
See the separate storage and disposal instructions https://www.fescon.fi/en/material-bank

Material usage

2.0 – 4.0 kg/m2 (1.5 mm – 3.0 mm)

Type liquid
Colour Fescon colour chart tints
Maximum grain size

1,5 mm - 2,0 mm - 3,0 mm

Package size 25 kg container

Must be stored in a dry and cool but non-freezing location at a temperature of +5°C...+25°C. The maximum allowed storage temperature +25°C must not be exceeded.


approx. 1.85 kg/l

Lowest usage temperature


Drying time

depending on conditions, dries through in 1 - 2 days per mm of thickness

Pull-out strength ≥ 0.5 MPa
Water permeability

W3 low

Relative air humidity less than 80%
Carbon dioxide diffusion resistance

approx. 110

Water vapour resistance

sd value  V2 (average level)

Thinner water
Tintability can be tinted
Gloss group

6 full matt

VOC content

< 1 g/l 30 g/l EU limit value for the product cat. A/g 30 g/l (2010)