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Friday, April 29, 2022

HOW TO DO PAINTING WITH CEMENT PAINT - HOMESLIBRO

PAINTING WITH CEMENT PAINT

The surfaces to be painted are prepared as already indicated. The cement paint comes in powder form. It is manufactured from white cement with pigments and special additives. The paint has also waterproofing qualities. Cement paint can be applied to concrete, plaster, asbestos cement, etc. but not on gypsum plaster, metal, wood surfaces, etc. which are hard surfaces devoid of a key. These surfaces are to be painted with distemper.

For painting with cement paint, the surface to be painted is first cleaned with clean water. Before application of the paint, the surface should be thorough. wetted to take care of the suction effect of dry surfaces. Pitting, if present in plaster, should be made good by an initial coating of cement paint as a primer.

 

Preparation of cement paints for painting. The cement paint is prepared as follows. Two parts by volume of cement are slowly added to one part of water to obtain a creamy consistency. Allow it to stand for 5 to 10 minutes. Then again add one more part of water to make the mix ready for painting. (The quantity of water added for further mixes is kept the same to get constant colour from the paint.) Only enough paint is to be mixed each time to last only for an hour or more depending on temperature. The paint should be kept stirred during use. The covering capacity of cement paint is about 4 m2/kg per coat.

 

Curing. When using ordinary cement paint, the painted surface must be cured. The surface should be sprinkled with water several times a day in between the coats and at least two days following the final coat. Generally, three coats for new works and two coats for old works are prescribed.

As curing interior work is very difficult and it can damage electrical wiring, a new superior cement paint, called Unique, which does not need any curing, has been introduced into the market by Super Cem company. It is claimed that even initial wetting of the surface is not needed for its use and it can be used as an internal or external paint without curing after paintings.


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