Functions of HPMC in Skim Coat

HPMC advances the critical properties of Skim Coat. Suppose HPMC is not included in the Skim Coat. In that case, the quality of the coating is hampered because of deprived Open time, workability, water retention, crack resistance, Adhesiveness, Slip resistance, stability, dispersibility, etc.  HPMC plays significant functions in Skim Coat:

1. Opening Time

With the property of water retention and adhesion, HPMC brings a longer opening time and better solidity.

2. Stability

HPMC gives superior storage stability; balances even viscosity disperses the pigments evenly and neutralizes the effect of pH value.

3. Dispersibility

HPMC functions as a colloidal protective agent and avoids the agglomeration of polymeric particles.

4. Water Retention

HPMC has better water-holding, adhesion, and lubrication property to avoid cracking, dripping, and off-powder occurrence. It provides better resistance to shrinkage and boosts work efficiency.

5. Adhesivity and Operationality

HPMC enhances the mortar’s plasticity and thus, gives a better grip between mortar and base material and improves the coating efficiency.

6. Thickening property

HPMC functions as a thickening agent in Skim Coat and improves tensile strength and flexural strength.

Thickening property also helps in preventing slipping problems between mortar and base material in construction projects.