When dry gypsum powder is mixed with water it hardens. This material which can be applied over brick, block, or concrete surface to form a smooth surface is known as gypsum plaster.
Gypsum plaster can be applied directly without any surface preparation. It takes 25 to 30 minutes to set and provide a white surface after plastering.
The key concept of plaster is that gypsum is used as a binding material. It is a white cementitious binding material manufactured by partial or complete dehydration of the mineral gypsum. Gypsum power becomes hard when blend with water. Plastering work on block walls or brick walls can be done by using gypsum plaster. It makes the process very fast because it is available in ready to use format and does not need sand. Only water is required to mix with gypsum powder. It offers very good acoustic and thermal properties while giving leveled walls the best finish.
This type of plaster gives a smooth interior finish and is an ideal base for good quality paints and wallpaper finishes. It can be used on both smooth and rough surfaces of the wall. It is very easy to apply on the surface and does not require much-skilled workers compared to traditional portland cement plaster.
Advantages Of Gypsum Plaster
- Easy to apply.
- There are no shrinkage cracks.
- Gypsum plaster set very fast which makes the construction process a bit faster.
- It does not require curing.
- It provides a neat and smooth finish.
Disadvantages Of Gypsum Plaster
- Not suitable for external walls.
- Cost is higher compare to cement plaster.