Product Advantages
- Easy to Incorporate in Dry-Mix Formulations–As a powder-form additive, Hydrophobic Powder can be blended directly into dry-mix production, making formulation handling more convenient and efficient.
- Helps Improve Water Repellency–It helps reduce water absorption in cement-based and mineral-based materials, supporting better moisture resistance in the finished product.
- Supports Cleaner and More Durable Surfaces–By helping limit water penetration, Hydrophobic Powder contributes to cleaner surface appearance and improved long-term durability.
- Suitable for Multiple Construction Applications–It is widely used in waterproof mortar, render, plaster, EIFS, putty, and other building material systems requiring water-repellent performance.
Technical Specification
Botai Chemical offers four grades of Hydrophobic Powder / Water Repellent: HP-20, HP-55, HP-70D, and HP-70E. Below is the detailed specification table for each grade, helping you compare the key physical and chemical properties and choose the suitable product for your application.
| Technical Item | HP-20 | HP-55 | HP-70D | HP-70E |
|---|---|---|---|---|
| Composition | Silane Coupling Agent | Silane-based additive | Silane-based additive | Silane-based additive |
| Appearance | Free-flowing white powder | Free-flowing white powder | Free-flowing white powder | Free-flowing white powder |
| Bulk Density | 300–600 g/l | 200–500 g/l | 200–500 g/l | 200–500 g/l |
| Moisture | < 2.0% | < 2.0% | < 2.0% | < 2.0% |
| pH Value | 7.5–9.5 (as 10% solution in water) | 7.5–9.5 (as 10% solution in water) | 7.5–9.5 (as 10% solution in water) | 7.5–9.5 (as 10% solution in water) |
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Product Applications of Hydrophobic Powder / Water Repellent
Hydrophobic Powder, also known as Water Repellent, is widely used in waterproof mortar, render, plaster, EIFS/ETICS, wall putty, tile adhesive, and compatible paints and coatings. It helps reduce water absorption, improve moisture resistance, and support better durability and surface performance in dry-mix and mineral-based construction systems.
Waterproof Mortar
Hydrophobic Powder helps improve the water-repellent performance of waterproof mortar and supports protection against moisture-related damage.
Render and Plaster
In render and plaster formulations, it helps reduce water uptake and supports better resistance to wet or humid conditions.
EIFS / ETICS
For EIFS and ETICS systems, Hydrophobic Powder can help improve water resistance in base coat and finish coat formulations.
Wall Putty / Skim Coat
Used in suitable putty or skim coat systems where lower water absorption and cleaner surface performance are required.
Tile Adhesive and Related Dry Mix Systems
Can be used in selected dry-mix construction formulations where water resistance and durability need to be improved.
Paints and Coatings
In compatible powder-based or mineral-based coating systems, Hydrophobic Powder can contribute to moisture resistance and longer-lasting appearance.
Dosage Guideline:
0.3-1.0 % (by weight of total dry mix), depending on desired hydrophobic powder / water-repellent performance.
Need custom formulations or comparative testing?
Contact BOTAI’s technical team for customized formulation support and performance consultation.
Contact Botai R&D Team
Packaging & Delivery
- Standard packaging: Botai Hydrophobic Powder is packed in export-standard 20 kg paper sacks with polyethylene liners suitable for bulk shipment and international delivery. Or on clients’ requirement.
- Minimum Order Quantity (MOQ): 3 metric tons.
- Custom Packaging: Available upon request
- Lead Time: 7 – 15 days after order confirmation
- Trade Terms: FOB / CIF / DDP under Incoterms® 2020
Storage and Shelf life
- Store in a cool, dry, and ventilated place below 25 °C.
- Keep the package tightly sealed and protected from moisture, direct sunlight, and heat sources.
- Blends with cement, fillers, or pigments improve stability but still require dry storage.
- Shelf Life: 12 months from date of delivery under proper storage conditions.
- For best performance, the product should be stored in its original unopened packaging under recommended conditions.
Safety & Compliance
SILRERIOS® Hydrophobic Powder / Water Repellent is safe, non-toxic, and environmentally friendly.
It complies with ISO 9001 and EU REACH standards.
For detailed handling and safety information, refer to the MSDS.
Email:
[email protected]About Henan Botai Chemical Building Materials Co., Ltd.
Established in 2004, Botai Chemical is a certified manufacturer specializing in Redispersible Polymer Powder, Cellulose Ethers (HPMC/HEMC/HEC), Calcium Formate, and Superplasticizers (SMF/PCE). Our products are widely used in dry-mix mortars, paints, oil drilling, feed, and detergent applications.
As a member of China’s Building Materials and Ceramic Industry Associations, Botai is actively involved in R&D and innovation for tile adhesive and repair materials. We operate two advanced R&D centers and hold over 25 patents and 20 registered trademarks.
With ISO 9001, EU REACH, HALAL, and FAMI-QS certifications, Botai ensures consistent quality and sustainable manufacturing. Our annual capacity exceeds 100,000 tons across VINNATE®, VAMCELL®, BOMCELL®, THYLOCELL®, FORCA®, and DEMACSA® product lines.
Our Certificate
Customer Case
Why Choose Us?
Factory established in 2004, backed by 20+ years of manufacturing expertise and over 60,000 m² of modern production facilities
Trusted by customers in 100+ countries and regions, with stable export supply and responsive service
One of China’s leading manufacturers of construction chemical additives, with a total annual capacity exceeding 100,000 tons
Two advanced R&D centers with full in-house laboratories and patented formulation capabilities
Certified quality and production systems: ISO 9001, EU REACH, HALAL, FAMI-QS
25+ patented technologies and 20+ registered trademarks, including VINNATE®, VAMCELL®, BOMCELL®, THYLOCELL® and more
Dedicated QC management and global technical support teams ensuring fast response and reliable service
Strong supply stability with long-term raw material partnerships and automated production lines, ensuring consistent quality and on-time delivery
FAQ
Hydrophobic Powder is a powder-form additive used to improve water repellency in construction materials. It is also commonly called Water Repellent Powder or Water Repellent.
In dry-mix construction applications, these terms are often used interchangeably. Different customers may use different names, but they generally refer to the same product direction.
It is mainly used in waterproof mortar, render, plaster, EIFS/ETICS, putty, tile adhesive, and other construction systems where lower water absorption is needed.
It is typically added directly into dry-mix formulations during production, allowing more even distribution throughout the material.
Yes. Botai can provide samples for testing and formulation evaluation.
Yes. We can provide TDS, packing information, and quotation based on your required grade, quantity, and destination.
The suitable grade depends on your application, formula system, and performance target. Contact Botai and we will recommend the appropriate product.
Suitable grades can be used in both interior and exterior construction formulations, depending on the specific system and requirement.
