Optimizing Performance with MHEC for Putty Powder and Plastering Powder

Ⅰ. The major differences between putty powder and plastering powder





Putty powder


Putty powder and plastering powder are popular building materials in any construction project. They serve similar purposes yet also have some differences.
Putty Powder mainly consists of white cement, calcium carbonate, and other additives. It creates smooth and even wall and ceiling surfaces. Putty powder fills cracks and imperfections. Add MHEC to your putty powder; it strengthens the surface and enhances the adhesion.


During the application process, the putty powder is mixed with clean water until you get a homogeneous mixture, then applied on the wall with a trowel.

After the putty dries up, you may use sandpaper to smooth it out. Generally, it’s an intermediate step between plastering and painting. And it’s mainly for interior wall surfaces because it might not be that durable to use it outside.



Plastering powder


Plastering Powder is also called gypsum plaster or plaster of Paris. It’s made of fine gypsum powder. It forms a paste that hardens into a solid substance when mixed with water. Plastering powder is very much like putty powder. It also can be used for interior wall surfaces but also on exterior walls. On top of that, the plastering powder is often applicable for large areas of repair.


The application process of plastering powder is as same as that of putty powder. Mix with water first, then apply it to the surface with a trowel. Lastly, plastering powder can be applied to interior and exterior applications, which is more versatile than putty powder.



Ⅱ. Benefits of MHEC for putty powder and plastering powder


In the world of construction and building materials, optimizing performance is crucial. One key component is using MHEC (Methyl Hydroxyethyl Cellulose) in putty powder and plastering putty. MHEC has superior properties, making it an efficient and productive additive. Let’s discover all the benefits of using MHEC. And how it can enhance the performance and quality of putty powder and plastering putty.


Ⅲ. Understanding the importance of performance optimization in putty powder and plastering putty


Performance optimization is a vital aspect of putty in the construction industry. The quality of these materials impacts the performance and durability of buildings and structures. To ensure the best results, it is important to understand the importance of performance optimization. How exactly can it be achieved using MHEC as an additive?



1. Enhancing Workability.


Putty powder and plastering putty need to have excellent workability to be applied and shaped onto surfaces. MHEC is known for its high water retention capacity, which helps prolong these materials’ workability. This means construction workers have more time to apply and mold the putty or plaster before it dries. The increased workability of MHEC ensures a smoother and more efficient application process.


2. Improved Adhesion.


Adhesion is a critical factor of putty powder and plastering putty. It determines how well the material sticks to the substrate. MHEC acts as a binder, enabling the putty or plaster to adhere to various surfaces. It increases bond strength and reduces the risk of detachment or cracks over time. MHEC ensures long-lasting and durable finishes.


3. Reduced Shrinkage.


Putty powder and plastering putty often experience shrinkage as they dry. Leading to cracks and uneven surfaces. MHEC reduces shrinkage by retaining moisture within the material during drying. This prevents excessive contraction and maintains the integrity of the applied layer.


4. Enhanced Water Resistance.


Putty powder and plastering putty are exposed to moisture and water, like bathrooms. MHEC improves the materials’ water resistance. In other words, the putty can withstand exposure to water without softening or losing its structural integrity.


5. Optimal Setting Time.


Setting time refers to the duration for putty powder or plastering putty to harden and dry. MHEC can be formulated to achieve the desired setting time. It allows flexibility and customization based on specific project requirements.


Optimizing putty powder and plastering putty is crucial for high-quality construction. MHEC offers benefits like enhanced workability and adhesion. With MHEC, you can achieve water resistance and optimal setting time, ensuring durability in different applications.



Ⅳ.  3 Most common issues during putty application


During the application of wall putty, it is important to address common problems that may arise. Addressing these common issues can ensure a successful result for your project.


Issue No#1 Hollow phenomenon or air bubble inclusions.


During the construction process, bubbles emerge over time, and the surface of the putty develops a bubbly texture.

Reasons cause this:

1. The base is too rough, and the putty is applied too quickly.


2. The thickness of the putty layer applied in one layer exceeds 2.0mm.


3. The moisture content of the base layer is too high, leading to improper density. The walls contain voids that trap air within, making it difficult to eliminate.


4. Uneven mixing results in bursts and blisters on the surface after construction. Some particles remain undissolved in the mixture, causing them to absorb excessive water and expand into bursts.


Step-by-step solution:


To address air bubble surfaces, follow these steps:


1. Use a spatula to directly break the small bubbled areas.


2. Ensure that the wall putty is thoroughly stirred before application. Give it about 10 minutes, then use an electric mixer to stir it again before scraping it onto the wall.


3. If any bubbles appear on the second or final surface layer, use a spatula to remove them.


4. For rough walls, it is recommended to use coarse putty as the base material for better results.


5. In environments with dry walls or strong winds and sunlight, moisten the wall with clean water as much as possible before applying putty. Only proceed with scraping the putty layer once the wall is free of watermarks.


By following these procedures diligently, you can ensure a smooth and bubble-free putty surface on your walls.



Issue No#2. Putty powder falling off.


When the wall putty is finished and dry, it tends to fall off when touched by hand.


Reasons cause this:


For interior walls, this issue arises when the polishing time of the interior wall putty powder is not properly controlled. After the surface dries up, the powder tends to fall off during polishing. As for exterior wall putty powder, if the face coating is thin, it becomes vulnerable in high temperatures during summer. The water evaporates rapidly, and insufficient water content prevents proper curing, resulting in easy peeling.


If the product has exceeded its shelf life, its bonding strength decreases significantly. Improper storage conditions can also lead to decreases in adhesive capacity. In cases where the base layer has a high water absorption rate, the putty dries up quickly without sufficient moisture for proper curing.


Recommended Approach:


The exterior wall putty surface needs to be sanded and properly sprinkled with water when dry. In general, this maintenance task typically requires two or more rounds. Additionally, for better results, you may consider mixing with a transparent sealing primer in a ratio of (1:5) during the second spray. It is essential to use the product within its validated warranty period. If this timeframe is exceeded, conduct a trial test to ensure it meets quality standards.


Waterproof treatment of the wall putty powder must be prioritized. And storage should take place in cool and dry conditions while ensuring no damage occurs to the packaging. During summer or when exposed to high temperatures, moisten the wall with clean water before applying putty. Only proceed with putting on putty when the wall’s surface is moisture-free.



Issue No#3. Wall Putty Crackings


Another common problem in wall putty application is the occurrence of cracks on the surface.


Reasons and Causes:

1. Insufficient drying of the substrate layer before construction. It is crucial to ensure that the moisture content of the substrate layer is ≤ 10%.


2. Inadequate drying of the base layer before applying the external layer. The external layer dries first, while the base layer is still drying. The differential shrinkage between the layers can occur, leading to cracks.


3. After seam-filling and flattening, before it dries up. Apply the inner layer with a strong farce on a substrate; it can lead to cracks.


4. Different thicknesses of putty can lead to differential drying rates between layers. The surface layer dries faster than the base layer, promoting crack formation.



To address this issue, it is necessary to remove any cracked wall putty. Flexible wall putty can be used for initial repairs, followed by standard procedures for minor cracks. Each layer of wall putty should be applied thinly, and a minimum time interval of 4 hours should be allowed between successive layers. Only when the first layer has completely dried should subsequent scraping and application occur according to established standards.



Ⅴ. Choose WOTAIchem for High-Quality Additives for Your Putty Powder and Plastering Powder


At WOTAIchem, we provide various construction additives, including cellulose ethers, RDP polymer, calcium formate, SM and PCE superplasticizers, anti-foaming agents, concrete fibers such as PP fiber, PVA fiver, PET fiber, and PVA fiber. You may reach out to us for any product-related questions, we’re always here to assist with your inquiries!

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Posted by Isabel

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