Silicone roof coatings are excellent in restricting moisture on different substrates like concrete, metal, modified bitumen, or single-ply. These coverings do not deform, degrade, or rupture from extended exposure to direct sunlight, reducing the energy costs and interior temperatures significantly. Silicone coatings are solvent-free and contain low VOCs.
Properties of Silicone Coatings
- Versatile
- Low Toxicity
- Water-resistant
- UV-resistant
- Resistant to temperature fluctuations
- Flexible
Chemicals & Silicone – A Strong Combination for Roof Coatings
There are several raw materials, that, when combined with silicone, render a tough waterproof barrier for roofs, balconies, and basements. Let’s discuss!
Polydimethylsiloxane (PDMS): It is an organic material (silicone elastomer) that offers foam control, abrasion resistance, water resistance, and anti-slip properties. It comes in different molecular weights (low to high) to be used for different purposes.
Low molecular weight product: Used to develop thin coatings
High molecular weight product: Used to develop sealants
Silanes: Hydrophobic properties, chemical and abrasion resistance, and thermal stability are some properties of silanes. They are used as adhesives for coatings.
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Polyorganosiloxane (Polysiloxane): Polysiloxane coatings are solvent-resistant and anti-foaming. These coverings are used on plastic (extruded) sheets where light transmission and clarity are of prime importance.
Silicone Resins: Silicone resins (polymers) can be transformed into thermoset or thermoplastic films, offering water repellency, chemical resistance, high heat stability, and electrical insulation. Silicone coats are used as roof insulation for buildings or heat-resistant coatings for kitchen and cookware.
Silicone Polyethers: Silicone polyether is used in formulations where leveling and abrasion-resistance are needed. These coatings can vary in solubility, viscosity, and molecular weight. Silicone polyethers offer a wide range of applications, including industrial and decorative coatings.
Elastomers: Silicone elastomeric coating is resistant to temperature, UV, and moisture radiation. Most of the experts recommend external applications on roofs and walls. Others call for electrical uses.
How to Apply Silicone Coatings?
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Surface Preparation
Ensure that the roof is clean and moisture-free. Remove dirt and particulates from the entire area using brooms or blowers. Also, search for tears, open seams, and potholes. Repair the flaws immediately. Lastly, wash the roof with pressurized water and leave it to dry. If there is mildew or fungus on the roof, treat it with a mixture of water and bleach. Rinse the entire area with water in the end.
N.B. The drying time depends on the humidity levels and air movement.
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Primer
Most silicone coatings adhere to the surface without a primer. However, it is best to perform an adhesion test on a specific area that requires coating.
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Application
To confirm uniform consistency and color, mix the solution. However, don’t dilute the chemical. Apply the first coat and allow it to dry for 3-12 hours. Apply the second coat afterwards. (Ensure that the skies are clear and blue).
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Cleaning & Maintenance
After the surface is dried and usable, ensure periodic cleaning with soap and water. You can also use a light-pressure wash.
What is Silicone Resin?
Silicone resins are low-molecular-weight polymers with outstanding thermal stability. They render protection at constant temperatures of up to 250oC. This compound is also used as a binder in varnishes and paints.
Properties
- Hydrophobicity
- Heat Resistant
- Chemical Resistant
- Compatible with Organic Compounds
- High Dielectric Strength
- Low Surface Energy
- Light Transmission Capabilities
So, what’s your decision? Need a strong water-resistant silicone coating today? Contact Waterproofing Experts. We’re the best in the business. Our professionals are recognized around the entire country, especially in Karachi, Lahore, Islamabad, and Quetta. Feel free to contact us through call or email and book your appointment!