Columbia University in the City of New York

Walls Plastered

The best support for the implementation of the microcemento is without doubt a wall enlucida with cement and sand.This type of firm support, gives greater hardness to the material.The drawback is the possible appearance of cracks of cement so it is advisable to leave at least harden the plaster to detect possible cracking. It is interesting to let a wall with plaster quality thing more thin as possible, as well as a good maestreado since the microcemento applied on walls, raised them only a millimeter by what any imperfection could appear again on the surface. When the setting is finished, if they appear,’re populated fissures through thick microcemento (with or without pigment) subsequently, by steel trowel, apply a thin layer of coarse microcemento pigmented to the entire surface.This layer serves to absorb small cracks but also to save microcemento fine not to apply the 1st hand of thickness it is possible you need to be up to 5 hands of this material (more expensive than the microcement thickness) we recommend Ironing Board through the plain steel the entire surface coated with thick microcemento before it dries to avoid having to sand any imperfections after the application. -Apply a 1st hand of fine microcemento with flexible rubber trowel, always starting on one side and from the corners of this side.It is important to keep in mind three things to gain time: 1 do not leave any cloth wall by cubrir2 always applied in a very thin layer (do not attempt to give fewer layers than those recommended, i.e. 3 hands) 3rd avoid leaving burrs of microcemento harden on the wall since it must be subsequently removed them using sandpaper (avoid sanding in the 1st hand already that if applies the product properly)(, without leaving burrs, will save much time)-let dry.Usually a couple of hours.When the microcemento is dry low tone.-apply the 2nd hand and after drying sanding with sandpaper grain 180 220_ apply the 3rd hand and after drying sanding with sandpaper grit 220 to 360 is very important let the microcemento dry at least 24 hours prior to sealing so that sealant to properly penetrate pores of the microcemento.(if there is moisture inside the microcemento sealer not may penetrate adequately into the pores) – applied, using a sponge one coat of sealer diluted by 40% in water and let dry at least 12 horas._ apply 2nd coat of pure hydrolacquer, without diluting and let dry at least 8 hours.-If you want a gloss finish will need polishing using a grit sandpaper 400 or 600-applied 3rd coat of sealer pure with sponge drained and let dry for at least 4 hours. -The use of waxes is recommended for a perfect finish with maximum protection.It will apply 2 coats of wax to saturate the pore finish. Original author and source of the article.

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