Difference between gypsum base putty, lime calcium base putty and cement base putty
Putty powder is mainly divided into gypsum based putty powder, lime calcium based putty powder and cement based putty powder according to different main raw materials. What is the difference between these three types of putty powder? How do we choose the appropriate type of putty powder in practical application?
What is gypsum based putty powder?
Gypsum based putty powder is mainly made of semi hydrated gypsum (building gypsum) as the main inorganic gel material, with heavy calcium, calcium lime, supplemented by redispersible latex powder, hydroxypropyl methyl cellulose and other polymer additives, and is mixed according to scientific formula. Gypsum-based putty powder has the characteristics of strong adhesion, good leveling and filling performance, high strength, small deformation coefficient, stability and non-cracking, and because of the properties of gypsum itself, it can play a good sound insulation performance, has breathing function, moisture control function, etc. Gypsum-based putty powder is generally used for the leveling construction of the bottom layer of the wall. In Sichuan, gypsum based putty is also called leveling gypsum, leveling corner plaster, water gypsum, etc.
What is lime calcium base putty powder?
The lime calcium based putty powder is mainly made of lime calcium as an inorganic gel material, heavy calcium as a filler, supplemented by various polymer additives such as redispersible latex powder, hydroxypropyl methyl cellulose, etc., and is mixed according to scientific formula. With the improvement of living standards, the demand for the quality of wall decoration and the comfort of the home is constantly increasing, and the problem of the yellow color of gypsum based putty powder is gradually amplified. Because of its yellow color, the whiteness of the wall after painting is always unsatisfactory, and more and more people begin to pay attention to the water resistance of putty powder, which is poor. The putty powder with lime calcium powder as inorganic cementing material has relatively high whiteness, which meets people's demand for more beautiful wall decoration, and lime calcium based putty powder has high strength, good water resistance and long service life. Grey calcium base putty powder is generally applied to plaster putty and used as surface putty material.
What is cement-based putty powder?
Cement based putty powder is mainly made of cement (white cement) as an inorganic gel material, with heavy calcium, lime calcium, and various polymer additives such as redispersible latex powder, hydroxypropyl methyl cellulose, etc., which are mixed according to scientific formula. Cement-based putty powder has the characteristics of good water resistance, strong weather resistance, high strength and strong adhesion, but the cement-based putty powder is rough and difficult to polish, and the decoration effect is poor. Generally, cement-based putty powder is used for exterior walls, while gypsum based putty powder and lime calcium based putty powder are used for interior walls.
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