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Primers for Paints & Coatings

Primers are essential to ensure the long-term stability of layered building systems. WACKER offers organic- and silicone-chemistry-based solutions addressing different primer functionalities, such as substrate hydrophobization, substrate consolidation and bonding between the substrate and coating.
Solutions
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The penetration potential is determined by measuring the amount of CaCO3 that is bound by 2 g of dispersion. The higher the final weight of the CaCO3 agglomerat, the better the penetration of the dispersion into the substrate.
VINNAPAS® polymer dispersions provide excellent adhesion and ensure good penetration of the surface, thus strengthening the substrate and controlling its absorbency.
In outdoor applications, hydrophobic VINNAPAS® dispersions ensure high water repellency and good barrier properties. VINNAPAS® dispersions are suitable for formulating primers with or without the use of fillers such as sand and pigments. For open-pore substrates such as concrete, cement and gypsum plasterboards, grades with small particle sizes are available.
Benefits
- Good impregnation due to high pore penetration
- Excellent barrier properties
- Low, uniform absorbency
- Good adhesion even on critical substrates
- Bridging of small cracks
- Good strengthening of the construction surface
Product Recommendations
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Products
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Technical data
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Solids content | Viscosity, dynamic | Glass transition temperature | ||
VINNAPAS® EP 3360 (BGH) | 59 - 61 % 59 - 61 % | 3000 - 6000 mPa·s 3000 - 6000 mPa·s | approx. 10 °C[1] approx. 50.0 °F[1] | |
VINNAPAS® EP 3362 | 59 - 61 % 59 - 61 % | 3000 - 6000 mPa·s 3000 - 6000 mPa·s | approx. 10 °C[1] approx. 50.0 °F[1] | |
VINNAPAS® EP 3888 | 49 - 51 % 49 - 51 % | 200 - 1200 mPa·s 200 - 1200 mPa·s | 2.0 - 8.0 °C[1] 35.6 - 46.4 °F[1] | |
VINNAPAS® SAF 34 | 49 - 51 % 49 - 51 % | 6000 - 12000 mPa·s 6000 - 12000 mPa·s | approx. 20 °C[1] approx. 68.0 °F[1] | |
VINNAPAS® SAF 608 | - - | 700 - 3000 mPa·s 700 - 3000 mPa·s | - - | |
VINNAPAS® SAF 72 | - - | 1500 - 3500 mPa·s 1500 - 3500 mPa·s | - - |
[1] Glass transition temperature | specific method, [] Suited, [] Well suited, [] Ideally suited
Silicone-based primers create a hydrophobic zone beneath the coating, improve adhesion and provide decorative coatings with lasting protection from water.
Our broad SILRES® BS portfolio includes water- and solvent-based primers. Paints can be made self-priming by adding the primer directly to the coating.
Application Spectrum:
SILRES® BS primers are suitable for:
- All mineral substrates
- Silicone-resin emulsion paints and plasters
- Emulsion paints and dispersion plasters
- Concrete coatings
- All coatings containing wetting agents
Benefits:
- Creation of a dry, stable substrate
- Enhanced adhesion of the coating
- Extended renovation cycles
- High penetration depth
- Excellent barrier properties
SILRES® BS Silicone Primers – the Basis for Masonry Protection