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High thermal stability up to 250 °C continuous use temperature.
Excellent weather resistance and UV stability for long-term outdoor performance.
Good compatibility with organic resins including acrylics, alkyds, and polyesters.
Low surface energy enabling superior water repellency and anti-soiling properties.
Solvent-based formulation (xylene/toluene blend) for easy integration into conventional coating systems.
High-performance architectural coatings for façades and concrete protection.
Heat-resistant coatings for industrial equipment and exhaust systems.
Weatherable topcoats for metal roofing and cladding systems.
Hybrid silicone-acrylic exterior wall paints requiring enhanced durability.
Functional additives in fire-retardant and intumescent coating formulations.
| Chemical Type | Organofunctional silicone resin (methyl/phenyl/silanol-modified) |
| Product Form | Liquid solution |
| Appearance | Clear, colorless to pale yellow liquid |
| Solvent Content | Approx. 60–65 % (xylene/toluene mixture) |
| Specific Gravity (20 °C) | 0.92–0.96 g/cm³ |
| Viscosity (25 °C, DIN 53019) | 8–12 mPa·s |
| Refractive Index (20 °C) | 1.49–1.51 |
| Flash Point (PMCC) | Approx. 25 °C |
Q1: What is the primary function of SILRES BS 54 in coating and paint formulations?
A: SILRES BS 54 acts as a hydrophobicity enhancer and surface modifier, improving water repellency, dirt resistance, and substrate adhesion—particularly on mineral-based substrates such as concrete, plaster, and masonry.
Q2: Is SILRES BS 54 compatible with waterborne systems?
A: Yes, it is specifically designed for use in aqueous dispersions and waterborne coatings. It can be incorporated directly into the formulation or added during the final mixing stage without requiring organic solvents.
Q3: How does SILRES BS 54 differ from standard silicone oils or emulsions?
A: Unlike linear silicone oils, SILRES BS 54 is a branched, partially crosslinked silicone resin that offers superior film-forming ability, thermal stability, and permanent hydrophobization—without migration or leaching under normal service conditions.
Q4: Can SILRES BS 54 be used in exterior architectural coatings exposed to UV and weathering?
A: Yes—it exhibits excellent UV stability and weather resistance due to its inorganic–organic hybrid structure, making it suitable for long-term performance in façade paints, renders, and protective coatings.
Q5: What is the typical dosage range for optimal performance in cementitious systems?
A: Dosage depends on the specific formulation and desired performance level, but it is generally effective at low concentrations—typically ranging from 0.1% to 2% by weight relative to the total solids content.
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