What is difference between The Plaster Of Paris and The Wall Putty?
The Plaster of Paris is the quick setting gypsum plaster. The plaster of Paris consists of a fine white powder of calcium sulfate hemihydrate which can harden when moistened and allowed to dry. The plaster of Paris does not shrink or crack while it is drying. Generally, precast has been used in the plaster of Paris, which helps hold parts of the ornamental plasterwork that is placed on cornices and ceilings. Due to having the fast setting features, the plaster of Paris has been used in the sculptor's works, which helps enable the sculptor to get the original idea within a shorter time. The mixture of plaster of Paris and glue has been applied to the plaster, wood panels, stone, or canvas, which helps to provide the ground for oil painting and tempera.
The preparation of the plaster of Paris has been done by heating the gypsum or calcium sulfate dihydrate to about 120 to 180 °C along with an additive to retard the set. This helps to provide passive fire protection for the interior surface of the building structure.
Application process of the Plaster of Paris
A thick layer of Plaster of Paris has been applied by the builders on the brick walls directly in recent days, but in earlier days, the plaster of Paris was applied after the application of the cement plaster and sand. A 5mm to 12 mm thick layer of the plaster of Paris can be applied on the building walls. In the exterior walls, the plaster of Paris can not be applied as it does not last for a long period. In this regard, the paster of Paris can be applied on the interior walls. Two types of plaster of Paris can be applied on the building walls, which are Patra finish and Patti finish. The rate of these two types of plaster of Paris is different from each other. In case of applying the primer coat after the plaster of Paris, it helps to absorb fewer paints, as a result, the cost has been reduced. The plaster of Paris is the best choice in case of making any ornaments or other types of curvy works on the ceiling or walls, which helps to give a tremendous finish.
Concept about the wall putty
The wall putty is a while cement-based powder, which has been made with polymer and other types of minerals that help to make the wall smoother. The wall putty has been used primarily in the walls to fill the holes and cracks in the walls, thus helping to prepare an even wall surface before the application of the paints on the walls. The use of the wall putty also helps to protect the wall against mould, stains and cracks on the walls. It can be used in any kind of walls, including concrete walls, precast walls, and rendered walls and helps to provide the best wall and paint finish.
Application process of the Wall putty
Before the application of the wall putty, the building wall needs to be cleaned first with the help of a hard metal brush, which helps to achieve the clear visibility of the cement and sand surface.
It is also necessary to make sure that there is no uneven surface on the walls before the application of the wall putty. Generally, two coats of the wall putty have been applied on the building walls. In this case, after applying the first coat of wall putty, some times neds to be given to dry the first coat. Before applying the second coat of wall putty, the wall surface has been smoothed with emery paper, which helps to achieve a smooth wall finish.
Key differences between Plaster of Paris and Wall putty
There are several differences between plaster of Paris and wall putty, which are as follows:
Based on the applied on
The plaster of Paris is best to apply on the interior walls, whereas the wall putty is best for both interior and exterior walls.
Based on bonding properties
In case of the plaster of Paris, there is very low binding property. On the other hand, the wall putty is a cement-based product which having a very high binding property.
Based on thickness
The thickness of the plaster of Paris can be 1 inch, which can cover all the undulations of the plastered walls. On the other hand, the ideal thickness of the wall putty is about 1.5 mm and the maximum thickness of the wall putty can be 3 mm.
Based on durability
The plaster of Paris is less durable, whereas the wall putty is highly durable as compared to the plaster of Paris.
Based on the strength
The plaster of Paris is lower in strength, whereas the wall putty has comprehensive strength as well as having good tensile adhesion.
Based on the setting time
The average setting time for plaster of Paris is about 5 to 7 minutes, whereas the average setting time for the wall putty is about 2 hours.
Based on the fire resistance capacity
Due to the presence of gypsum, the plaster of Paris has a higher fire resistance capacity. On the other hand, the wall putty has less fire resistance capacity as compared to the plaster of Paris.
Based on the application surface
In case of the moist surface, the plaster of Paris can not be applied. On the other hand, wall putty can be applied on the moist surface. In this conext, no water curing is required.
To learn more, watch the following video tutorial.
Video Source: Engineering Motive
Based on the benefits
The paster of Paris helps to provide an easy solution for the puning surface and interior walls, whereas the wall is water-resistant and influences the easy application of the paints on the walls.
