Water retention of hydroxypropyl methylcellulose

  Hydroxypropyl methylcellulose(HPMC) has excellent water retention, which can prevent the moisture in the wet mortar from evaporating prematurely or being absorbed by the base layer, ensuring that the cement is fully hydrated, thereby ensuring the mechanical properties of the mortar. HPMC is especially beneficial to thin-layer mortar and Absorbent base or mortar applied under