Gypsum plaster is also called POP. It’s white cementation produced by dehydrating mineral gypsum, partially or completely. It’s often added with decelerators or hardeners. Employed with water in a plastic state, it sets and hardens by the chemical reunification of gypsum and water. 

Effects of HPMC on Gypsum Products

●Improved Workability: HPMC enhances the workability and ease of application of gypsum plaster, allowing it to spread more smoothly and efficiently on a variety of surfaces. Its water-retaining properties prevent rapid drying, allowing contractors to achieve consistent results without compromising quality.

●Enhanced Adhesion: HPMC helps improve the adhesion of gypsum plaster to dissimilar substrates, promoting a strong bond and reducing the risk of delamination or cracking over time. This produces a long-lasting, durable plaster finish.

●Superior Crack Resistance: HPMC-treated plaster is more resistant to cracking, reducing the likelihood of cracks forming due to shrinkage or movement. This is particularly beneficial in areas prone to temperature fluctuations or structural changes.

●OPTIMAL OPEN TIME: HPMC extends the open time of the plaster, giving craftsmen more time to perfect their finishing touches. This increase in machinability means improved aesthetics and a more refined final appearance.

●Controlled Water Retention: The controlled water absorption and release capabilities of HPMC ensure proper curing of the plaster, allowing for even drying and minimizing surface imperfections. This controlled hydration helps create an even, flawless finish.

The Role Of RDP For Gypsum Plaster

Gypsum is a well-established construction material for interior applications. It offers good workability and its setting time can be adapted for every application as required. Gypsum building materials generate a comfortable living atmosphere due to good humidity balance. Additionally, gypsum shows excellent fire resistance. However, it is not water resistant, therefore only interior use is possible. Combinations of gypsum and hydrated lime are very common in plaster formulations.

●Increased water demand: increased open time, expanded spry area and more economical formulation.

●Easier spreading and improved sagging resistance due to improved consistency.

To learn more about the applications of HPMC and RDP, please contact us!