Take you to understand the specific use of HPMC

Hpmc as a water-retaining agent and retarder for cement mortar, it makes the mortar pumpable.
In plastering slurry, gypsum, putty powder or other building materials, it is used as a binder to improve spreadability and prolong operation time.

Hydroxypropyl Methyl Cellulose is used as a paste for ceramic tile, marble, plastic decoration, as a paste enhancer, and it can also reduce the amount of cement.

The water retention of hydroxypropyl methylcelluloseHPMC can prevent the slurry from cracking due to drying too fast after application, and enhance the strength after hardening.