China's leading manufacturer of Silicone Hydrophobic Powder, offering Plaster Retarder solutions.
As an important additive in modern construction formulations, Hydroxypropyl Starch Ether helps improve workability, anti-sagging performance, open time, water retention, and application smoothness. It is especially valued by manufacturers of dry mix mortar who need stable product quality and better on-site construction performance.
For manufacturers and distributors looking to improve product performance and market competitiveness, McKem offers stable quality, export-ready packaging, and professional supply support.
Silicone Hydrophobic Powder is a free-flowing powder additive based on silicone compounds and specially processed carriers. It is designed to be easily mixed into dry powder formulations and, once added to cement- or gypsum-based systems, provides excellent hydrophobic properties after curing.
When mortar or plaster containing this additive comes into contact with water, the silicone hydrophobic component forms a protective water-repellent effect inside the capillary structure. This reduces water absorption while maintaining the material’s breathability to a certain extent.
Compared with liquid water repellents, silicone hydrophobic powder offers several practical advantages:
This makes it an ideal choice for dry mortar manufacturers and construction chemical producers.
Below are typical technical parameters for construction grade Silicone Hydrophobic Powder. Specific grades may vary depending on formula and application requirements.
| Item | Standard Specification |
|---|---|
| Appearance | White or off-white free-flowing powder |
| Active Ingredient | Silicone-based hydrophobic compound |
| Bulk Density | Approx. 300–600 g/L |
| Moisture Content | ≤ 5% |
| pH Value | Neutral to weak alkaline |
| Solubility / Dispersion | Dispersible in dry mix systems |
| Recommended Dosage | 0.1%–1.0% |
| Application | Mortar, plaster, grout, putty, waterproof systems |
Note: The exact dosage should be determined through laboratory and production testing according to raw materials, target water repellency, and formula design.
By choosing right products, you can optimize crack resistance, toughness, and durability across a wide range of concrete projects.
The main benefit of Silicone Hydrophobic Powder is its ability to significantly reduce water absorption in mortar, plaster, grout, and other building materials. This helps keep surfaces and structures drier over time.
By reducing water penetration, the product helps protect building materials from moisture-related damage such as freeze-thaw deterioration, efflorescence, cracking, and mold risk.
This additive is especially useful for exterior wall systems, façade mortars, insulation systems, and humid-area construction where water resistance is critical.
Because it is in powder form, the product can be directly incorporated into dry mix mortar formulations without requiring special liquid dosing equipment.
While improving hydrophobic performance, the product can still allow construction materials to retain reasonable vapor permeability, depending on the formula design.
A relatively low dosage can deliver a clear improvement in water resistance, making Silicone Hydrophobic Powder a practical additive for higher-value mortar products.
Michem focuses on supplying reliable construction chemical additives to global customers. We understand that for dry mortar manufacturers and building material importers, consistency and technical support are just as important as price.
Whether you are a dry mix mortar factory, tile grout producer, wall putty manufacturer, waterproofing material distributor, or construction chemical importer, McKem can support your sourcing needs.
Our silicone hydrophobic powder plays an irreplaceable role in concrete construction projects due to its superior water reduction rate.
Silicone hydrophobic powder forms a low-surface-energy, water-repellent molecular film on substrates through siloxane bonding, effectively repelling liquid water by reducing surface wettability.
After being evenly dispersed in the dry mix formula and mixed with water on site, Silicone Hydrophobic Powder becomes integrated into the mortar or plaster matrix. During curing, the active silicone component distributes through the capillary network and forms a hydrophobic barrier on internal pore surfaces.
This mechanism helps:
Because it works within the material structure rather than only on the surface, it can provide durable internal water repellency.
The typical dosage of Silicone Hydrophobic Powder is around 0.1% to 1.0% of the total dry mix formulation.
The correct dosage depends on:
Pre-testing is strongly recommended before commercial production.
Many manufacturers prefer Silicone Hydrophobic Powder over liquid water repellents for dry mix applications because of its practical production advantages.
For dry mortar factories, this makes powder-type hydrophobic additives a highly efficient choice.
Store in a cool, dry, and well-ventilated place. Avoid exposure to moisture, rain, and direct sunlight. Keep bags tightly sealed after opening.
Usually 12 months in unopened original packaging under proper storage conditions.
provides complete support for international customers purchasing Silicone Hydrophobic Powder.
This helps buyers streamline import procedures and evaluate product suitability with confidence.
It is used as a water repellent additive in dry mix mortar, plaster, tile grout, putty, waterproof mortar, and other construction materials to reduce water absorption and improve moisture resistance.
Yes. It is widely used in cement-based products such as waterproof mortar, exterior plaster, tile grout, and repair mortar.
Yes, in many gypsum-based applications it can improve moisture resistance, although actual compatibility should be verified through formula testing.
Typical dosage is between 0.1% and 1.0%, depending on the application and target performance.
It is designed to improve water repellency while maintaining a reasonable level of vapor permeability, depending on the formulation.
Yes. Michem supports sample requests for laboratory and factory testing.
Submit your formulation system to receive customized selection recommendations.
Samples shipped within 48 hours, accompanied by batch stability comparison reports.
Annual framework agreements enjoy priority scheduling + tiered pricing.
No.277 Gongye N Road, Licheng, Jinan,Shandong, China 250000
Tell us about your construction type, raw materials, and performance goals. Our team will recommend the best admixture solution and provide free samples for testing.
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