SR. NO | SAND CEMENT PLASTER | CRYSTAL GYPSUM PLASTER |
1. | It is not a ready mix plaster. Mixture of sand and cement to be mixed at sites in different ratios i.e. a difficult process to monitor the right mix. | Specially formulated ready mix plaster. Mixture of Calcium Sulphate, Exfoliated vermiculities / perlites & addities. |
2. | Sand is used as an aggregate. | Exfoliated vermiculities act as aggregate which help to achieve better coverage and good thermal insulation. |
3. | After sand cement plaster, POP punning is required for better surface finish. | Substitutes 2 applications: 1.Cement Plaster 2. POP Punning. Provides better smooth surface finish just in one application. |
4. | Pre-curing and Post-curing is necessary. | No post curing is required, thus saves time and water. |
5. | Setting time varies from 60-120 minutes. | Graduated setting time to enhance easy workability. |
6. | Development of shrinkage cracks are quite frequent | No shrinkage cracks. Once set, it provides crack free smooth surface. |
7. | It leaves water patch marks behind | No patch marks is obtained once it is set and dry. |
8. | High Percentage of wastage during application | Nominal wastage during application |
9. | Rough finished surface is obtained. | Very Smooth fine finished surface is obtained. |
10. | Difficult to achieve different forms of decoration | Easy and suitable for any type of decoration. |
11. | Reflects sound | Absorbs sound |
12. | Too much time consuming. | Time saving process. |