The difference between gypsum-based putty, lime-calcium-based putty and cement-based putty

    Putty powder is mainly divided into gypsum-based putty powder, lime-calcium-based putty powder and cement-based putty powder according to the different raw materials. What are the differences among these three types of putty powder? How can we choose the right type of putty powder in practical application?

What is gypsum-based putty powder

   Gypsum-based putty powder is mainly composed of hemihydrate gypsum (building gypsum) as the main inorganic gel material, with heavy calcium, lime calcium, and then with re-dispersible glue powder, hydroxypropyl methyl cellulose and other polymer additives, which are mixed according to scientific formula. Gypsum-based putty powder has the characteristics of strong adhesion, good leveling and lime filling performance, high strength, small deformation coefficient, stability and non-cracking. Because of the properties of gypsum itself, gypsum-based putty powder can play a good sound insulation, breathing and humidity regulating function. Gypsum-based putty powder is generally used in leveling construction of the bottom of the wall. In Sichuan area, gypsum-based putty is also called leveling gypsum, leveling cornered gypsum, water gypsum and so on.

What is Grey Calcium Putty Powder

  Grey-calcium putty powder is mainly composed of grey-calcium as inorganic gel material, heavy calcium as filler, re-dispersible glue powder, hydroxypropyl methyl cellulose and other polymer additives, which are mixed according to scientific formula. With the improvement of living standards, the demand for wall decoration quality and home comfort is constantly rising. The yellow color of gypsum-based putty powder is gradually enlarged. Because of its yellow color, the whiteness of wall paint is always unsatisfactory. More and more people begin to pay attention to the water resistance of putty powder, and the water resistance of gypsum-based putty powder is poor. The putty powder with lime-calcium powder as inorganic cementitious material has relatively high whiteness, which meets people's demand for more beautiful wall decoration. The putty powder with lime-calcium base has high strength, good water resistance and long service life. Grey calcium base putty powder is usually scraped on gypsum putty in batches and used as surface putty material. 

What is cement-based putty powder

Cement-based putty powder is mainly made of cement (white cement) as inorganic gel material, mixed with heavy calcium and lime calcium, and then supplemented with re-dispersible latex powder, hydroxypropyl methyl cellulose and other polymer additives. Cement-based putty powder has the characteristics of good water resistance, weatherability, high strength and strong adhesion. However, cement-based putty powder is rough and not easy to grind and has poor decorative effect. Generally, cement-based putty powder is used for external walls, while gypsum-based putty powder and lime-calcium-based putty powder are used for internal walls.