Base
Allow the KS plastering to harden for at least one week before painting. Choose the method of removing the old paint and cleaning the surface according to the strength of the surface to be painted. You can usually remove old whitewash with a pressure washer. However, film paints need to be removed with water sand blasting, for example. If the base has dried up, wet it until it is darker in colour. If the painting base is too dry, tool marks are easily left into it, and if it is too wet, there will be shiny patches. The base must always remain absorbent. Before beginning work, carry out a test painting to ensure the correct tint. The tint is affected by, for example, the absorption properties and roughness of the base, the plasticity of the paint, the working method and, naturally, how the work is performed.
Mixing
For one bag (15 kg) of paint, use:
15-22 l of water during the first application and 13-20 l of water during the second application. Add the dry material to the water and mix thoroughly. With a drill paddle, the mixing time is around 3 minutes.Allow the paint to stand for around 15 minutes and mix it again for a short while. Find the correct consistency at this stage by gradually adding the rest of the water. We do not recommend adding all of the water right at the start. In order to ensure uniform colour, the different batches should have the same consistency and mixing time. The finished paint remains workable for around two hours.
Work instructions
Paint two layers normally using a brush or a lime paint brush. You can also apply the paint by spraying, but you must then smooth the sprayed surface with a brush or a lime paint brush. Use thinner paint for the first layer. Once the paint has dried enough to feel dry to the touch (after around one day), you can paint the second layer. The conditions must be good, particularly when painting the second layer. Dark colours require greater care than light colours when painting. Even a third layer may be required. Continuous surfaces must be painted in one go. You should “hide” the working seams in corners, expansion joints or for instance behind drainpipes. When painting stone surfaces with an inorganic paint, liveliness emphasising the materials can be achieved in the finished surface. The water-soluble salts in the cement and the salts formed during the hardening of the lime may rise to the surface with moisture and appear as efflorescence. Heavy rain too soon after painting, internal moisture in the structure, thermal leakage and insufficient ventilation cause efflorescence. The risk can be reduced by protecting the fresh paint from rain.
After treatment
When the temperature is:
+20°C, protect the fresh paint from rain and strong sunlight for one day
+10°C, protect the fresh paint from rain for three days
+5°C, protect the fresh paint from rain for seven days
Stone Colour may not be used in a temperature below +5°C
Exceptionally heavy rain may damage the paint surface even after the aftercare period has ended
We recommend painting well in advance to autumn rains and frost.
Service instructions
A dirty Fescon Stone Colour KS surface can be cleaned with a pressure washer. Remove any damaged spots and repair the holes. Old, undamaged paint does not need to be removed. No water should remain on the base after cleaning. Paint the Stone Colour KS surface with Stone Colour KS following the work instructions of the product description. One treatment is normally sufficient for a cleaned, undamaged paint surface. Two or more treatments are 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