Water repellent is a functional additive or surface treatment designed to reduce water absorption and moisture penetration in construction materials. It supports improved durability, weather resistance, and protection against efflorescence. KIMACELL® provides cellulose ether solutions that can work alongside water-repellent systems in mortars, concrete, coatings, and other cement-based formulations.
Item | Specification |
Product Name | Water Repellent |
Appearance | White to off-white powder / liquid |
Active Ingredient | Silicone-based / Silane-Siloxane / Other hydrophobic agent |
Active Content | ≥ 98%* |
Moisture Content | ≤ 2.0%* |
pH Value | 6.0–9.0* |
Bulk Density | 300–600 g/L* |
Water Solubility | Dispersible / Slightly soluble / Insoluble, depending on grade |
Hydrophobicity | Excellent |
Water Absorption Reduction | ≥ 80%* |
Particle Size | 95% min. passing 80 mesh* |
Thermal Stability | Good |
Alkali Resistance | Excellent |
Storage Stability | ≥ 12 months under recommended conditions |
Packaging | 20 kg / 25 kg bags or customized packaging |
Storage Condition | Store in a cool, dry place in tightly sealed packaging |
Application | Dry-mix mortar, tile adhesive, plaster, exterior wall systems, waterproof mortar, etc. |
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Dry-Mix Mortar: Improves water resistance and reduces moisture penetration in cement-based dry-mix mortar formulations.
Tile Adhesive: Enhances water resistance and durability, helping maintain adhesive performance under humid or wet conditions.
Exterior Wall Putty: Reduces water absorption and improves weather resistance, protecting exterior surfaces from moisture-related damage.
Waterproof Mortar: Provides hydrophobic properties that help minimize water penetration and improve long-term protection.
Cement Plaster: Reduces capillary water absorption while maintaining suitable workability and adhesion of cement-based plaster systems.
EIFS & Thermal Insulation: Helps insulation systems resist rainwater penetration while supporting durable exterior wall protection.
Concrete Products: Improves surface hydrophobicity and reduces moisture uptake in precast concrete and cement-based products.
Gypsum Products: Helps reduce moisture absorption and improve resistance to humid environments in gypsum-based construction materials.

