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Cementite, what is it forand how to choose it. How to use it.
When we talk about DIY and wood treatment, thecementiteit is a material that acts as a link between the wood and the paint that will be applied.
When we talk about home furnishings and renovations, thecementiteit is a material made from multilayer concrete mixed with marble powders and inorganic pigments used to make floors and wall and ceiling coverings. Again, in chemistry, cementite is an iron carbide, that is a compound consisting of 93.3% iron and 6.67% carbon. On this page we will focus on cementite used for wood treatment.
Cementite, what is it for
In the steel industry, cementite is used for the production of steel and has many other applications.
In construction it spread strongly in the late nineteenth century and is used for the production of tiles and coatings.
In carpentry it is used to treat the surface of raw wood for the purpose of varnishing.
Therecementite, spread on the raw wood, it forms a gypsum background which serves to make the wood suitable for subsequent painting. The wood tends to absorb the paints used, thanks to the cementite layer this will not happen in addition to the fact that the cementite is able to provide a more homogeneous surface to be painted. That's what it's for!
As well as the water-based and solvent-based paints that we find, on the market we can find different types ofcementite for wood.
Therewater-based cementitiousrelease anywayVOC(volatile organic compounds) and other compounds harmful to human health and the environment, but it does so in a drastically reduced form compared to solvent-based cementite.
Therewater cementiteit should be applied with synthetic bristle brushes. In addition, it is possible to use the same brushes for different jobs simply by washing them with water.
Therewater cementiteit dries faster, so we recommend this product if you are quick to apply it, otherwise brush strokes may come out!
Solvent-based cementite is oil-based. The solvent or diluent used is, in general, white spirit or white petroleum.
Unlike water-based cementite, solvent-based cementite releases more volatile organic compounds. It should be applied with a natural bristle brush and, after use, the brush must necessarily be washed with white spirit and cannot be used to paint with water-based paints or acrylic colors.
It is absolutely not true that solvent-based cementite has better resistance than water-based cementite!
There solvent-based cementiteit dries much slower than water-based enamel so avoid using it in very humid environments; furthermore, the tools you have used must be thoroughly cleaned with white spirit otherwise they must be thrown away.
For all other differences and precautions for use to be taken when using water-based or solvent-based cementite, please read the page dedicated to the differences between water-based and solvent-based enamel. The differences, in fact, lie in the type of diluent, so the reported page will help you choose between the two products.
Spray-type cement mortars for wood
Some companies, to facilitate application, offer cementite in practical and fast spray cans. In reality, cementite is a very dense product, so it should be applied with a roller or brush rather than with the spray can. The cans can be useful if the work to be done is very complex. For the use of cementite spray, protect all the furniture contained in the environment in which you are working well. The spray is rather unpredictable, just a breath of wind is enough to dirty the surrounding environment with dots of cementite.
Cementite, how to use it on wood
Therecementiteit can be applied by roller, brush or spray in spray format. Our advice is to use a brush.
Cementite must be mixed several times during use.
A first coat must be applied, which you will need to dry completely and then sand with a coarse sandpaper (type 100).
When the surface is perfectly smooth it will be possible to apply a second coat of cementite, let it dry and smooth the surface again. This time, however, you will need to use a finer sandpaper. Since the wood will need to be repainted, a 220 grit will do.