Concentrated Siliconate Water Repellent | Manta WS115

Manta WS115 is a concentrated alkali metal methyl siliconate solution (20% active substance, 30% total solids, pH 13) used for hydrophobic treatment of natural stone, brickwork, unglazed ceramics and fair-faced concrete. It must be diluted to an active concentration of 3% or below before application, a limit that prevents white alkaline bloom on treated surfaces.

Manta WS115 is a highly concentrated, water-reducible solution of alkali metal methyl siliconate. Designed specifically for the hydrophobic treatment of natural stone and porous masonry, it must be diluted prior to application.Mechanism: Once absorbed by the substrate, the active siliconate reacts naturally with atmospheric carbon dioxide and internal moisture.  This chemical reaction yields an insoluble, invisible polymethylsilsesquioxane network deeply embedded within the capillary pores. It effectively repels liquid water while maintaining maximum water vapor permeability.

Features

• Invisible Protection: Fully penetrating formula that leaves absolutely no surface film, preserving 100% of the substrate’s natural appearance, color, and texture.
• Superior Hydrophobicity: Drastically reduces capillary water uptake, delivering exceptional water, moisture, and seepage resistance.
• Extreme Weatherability: Demonstrates outstanding thermal stability (resisting temperature fluctuations from -50°C to 150°C) and provides robust UV and anti-aging protection.
• Damage Mitigation: Actively prevents structural spalling and flaking caused by severe freeze-thaw cycles and weathering, significantly increasing substrate longevity.
• Cost-Effective Efficiency: Highly concentrated formulation allows for high dilution rates, ensuring economical application with long-lasting, wash-resistant durability.

Manta WS115 is predominantly specified for the hydrophobic surface treatment of porous mineral building materials:

1. Substrate Impregnation: Highly effective on natural stone, brickwork, unglazed ceramics, fair-faced concrete, cementitious mortars, perlite, and gypsum boards. (Note: When applying to wood, preliminary testing is strictly required as high alkalinity may cause severe discoloration).
2. Formulation Additive: Functions as an excellent performance-enhancing additive for sodium silicate (water glass) systems.

How to use

1. Substrate Preparation

The surface must be structurally sound, clean, and free of dirt and contaminants. Static or dynamic cracks must be properly routed and filled with an appropriate exterior-grade repair mortar or sealant (Do not use neat cement slurry or standard powder putty).

2. Pre-Dampening & Dilution

Pre-Wetting: Slightly dampening the mineral substrate prior to application can significantly optimize capillary absorption.

Dilution: Dilute the WS115 concentrate with clean water to an active concentration of ≤ 3%. Warning: Concentrations exceeding 3% dramatically increase the risk of severe white crystalline bloom (efflorescence) on the treated surface.

3. Application Method

Apply the diluted solution via low-pressure sprayer, brush, sponge, or roller. It can also be utilized in dipping/soaking processes or as an integral admixture in concrete.

Wet-on-Wet Application: For maximum penetration, apply a second coat while the first coat is still visibly wet.

Surface Wiping (Crucial): When treating dense surfaces such as polished stone or ceramic tiles, any unabsorbed excess liquid must be wiped off immediately with a clean, soft cloth before it dries to prevent permanent alkaline white spots. Allow the treated surface to dry naturally and protect from water for a minimum of 24 hours.