Silicone Water Repellent

Silicone Water Repellent Silway718


Silway 718 is a water-dilutable solution of Potassium propyl siliconate designed to impart water repellency to a wide variety of surfaces.

When diluting Silway 718, the product must be added into water under stirring.

The recommended dilution rate ranges from 1:10 – 1:100, the ideal dilution rate for best performance depends on the mineral substrate.

Typical Applications

•As a surface treatment in applications that utilize its ability to impart a water repellent surface and reduce water absorption

•For use on bricks, sandstone, limestone, and ceramics

Key Features

•Reduces water absorption into the substrate, thus reducing spalling due to freeze-thaw and efflorescence, thereby increasing the life of the substrate

•Colorless and non-yellowing protection preserves the natural appearance of the substrate

•Penetrating and breathable

•VOC free


Typical Physical Properties




Colorless to slightly yellowish liquid



Solid Content, %

Approx 52



Specific Gravity (25/25 ℃)



• Silway 718 should only be applied on fully cured substrates. Silway 718 can be applied on new and old substrates. Performance tests should be conducted 14 days after application.

• The surfaces to be treated should be air-dry and clean in order to ensure deep penetration. Dust, grease, oil, overgrowth, etc. have to be cleaned off before treatment. Surface cleaning methods include suitable sandblasting, water blasting or washing and chemical cleaning. Best performance is achieved on a dry surface. During application the temperature of the substrate should be within the range of +4 to +40 °C. Protect against rain after application for at least 4 hours.

•Silway 718 is best applied by dipping the substrate into the solution of the product or by using low pressure pumping equipment with a wet fan type spray nozzle. The time allowed for dipping depends on how absorbent the substrate is. Contact times can range from 5 s up to several minutes. All equipment and containers must be clean and dry. After use they can be cleaned with water.

•It is recommended to cover all substrates that are sensitive towards alkaline material. Substrates such as glass, wood, plastic and metal cannot be treated with Silway 718. The formation of white deposits on these surfaces will be observed. Plants in the vicinity of the application area should be protected.

•Silway 718 should be applied in a well-vented environment. The treated product should not be covered in an air-tight plastic foil immediately after application. The treatment of pigmented surfaces with dilutions of Silway 718 should be evaluated in advance. Generally, it is recommended to apply the diluted product on a small test patch first for a compatibility check.


Packing :200L drums or 1000L IBC or according to customer request.


• Avoid children coming into contact with this product

• Being storage in closed containers

• No fire on the construction site

Shelf Life :12 months





The Way of Silicone Innovation

Hangzhou Silway New Material Technology Co.,Ltd. Founded in 2014, is a young but fast-growing Silicone Water Repellent Silway718 manufacturer specialized in the research, development, production and marketing of Silicone Water Repellent Silway718.

Silway focused on the modified siloxane and formulation technology, product line covers from agricultural silicone adjuvant, silicone water repellent, cosmetic silicones, sealant & additive, modified siloxane for die-casting.etc.

  • R&D

    Founders have over 20 years’ technical experience in silicone industry

  • Quality

    ISO9001 Certificated

  • Service

    Sales for international market all have at least 5 years experience, easy to communicate and professinal in silicone industry.

  • OEM

    Offer OEM service and customized products.

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Silicone Water Repellent Silway718 Industry Knowledge Extension