Manta WS120 Nanoscale penetrating water repellent

Manta WS120 is a deep-penetrating nanoscale silane cream (thixotropic paste) engineered for the hydrophobic impregnation of exposed architectural concrete. Supplied as a water-based emulsion, it is highly specified for the preventative protection of new constructions as well as the preservation and maintenance of existing concrete infrastructure.

By forming a durable moisture barrier within the capillary network, WS120 effectively mitigates the ingress of aggressive corrosive agents, including acid rain and waterborne chlorides. Furthermore, it actively inhibits the proliferation of mold, moss, and other biological growth that cause severe aesthetic discoloration. Ultimately, WS120 significantly enhances structural durability and extends the service life of reinforced concrete without altering its original breathability or appearance.

Properties

1. Deep Penetration: Achieves an exceptional penetration depth of 3–4 mm into dense concrete substrates.
2. Superior Protection: Drastically reduces capillary water absorption and blocks the ingress of waterborne chloride ions, stopping rebar corrosion at the source.
3. 100% Breathable: Forms an invisible, highly breathable hydrophobic network that will absolutely not blister, flake, or peel over time.
4. Micro-Crack Mitigation: Highly effective at treating and imparting hydrophobicity to static micro-cracks up to 0.2 mm in width.
5. Optimized for Vertical/Overhead Use: The thixotropic paste formulation ensures zero sagging or dripping. It is specifically ideal for facades and overhead applications (soffits), minimizing material waste.
6. Aesthetic Retention: Leaves the substrate’s original architectural appearance and surface texture completely unaltered.
7. Eco-Friendly & Safe: Water-based formulation allows for easy tool cleanup and significantly lowers VOC emissions compared to pure liquid silanes.

Manta WS120 is highly specified for the long-term preservation of critical concrete assets exposed to severe environmental stressors, including marine tidal zones, coastal salt spray, chemical de-icers, and continuous freeze-thaw cycling.

Due to its non-sagging, thixotropic nature, it is exceptionally suited for vertical facades and overhead surfaces across various sectors:

• Transportation Infrastructure: Bridge piers, overhead soffits, urban overpasses, railway networks, and tunnel linings.
• Marine & Coastal Structures: Harbors, commercial docks, seawalls, and port facilities.
• Architectural & Industrial Assets: Fair-faced concrete facades, commercial building envelopes, and power plant cooling towers.

Application Instructions & Surface Preparation

1. Substrate Age (Curing Requirements) To ensure optimal penetration, newly cast concrete must be allowed to fully cure for a minimum of 28 days (4 weeks). Any areas treated with cementitious repair mortars must cure for at least 14 days prior to silane impregnation.
2. Surface Preparation Thorough surface preparation is paramount for the deep penetration of the thixotropic cream:

• Defect Rectification: Structurally repair deep honeycombing, voids, and exposed rebar using a suitable, high-quality repair mortar (do not use neat cement slurry).
• Mechanical Cleaning: Utilize a steel scraper, wire brush, or mechanical abrasion to completely remove laitance, dirt, and friable attachments.
• Contaminant Removal: Ensure the substrate is free from grease, oil, and atmospheric pollutants. If formwork release agents or curing compounds were used, their compatibility must be verified via a preliminary test patch. If they impede penetration, they must be completely removed mechanically.
• Moisture Parameters: The concrete surface must be visibly dry prior to application, with a residual moisture content strictly not exceeding 6%.

3. Application Equipment & Method

• Large-Scale Projects: The use of high-pressure airless spray equipment is highly recommended. This method maximizes application efficiency, ensures a uniform thick-film build, and significantly reduces material waste.
• Manual Detailing: For smaller or intricate areas, the paste can be effectively applied using a high-quality lambskin roller or brush

4. Post-Application Protection Following application, the treated surface must be protected from rain, heavy moisture, and extreme weather conditions for a minimum of 24 hours to allow the silane to fully penetrate and complete its chemical reaction under ambient conditions.

Standards & Compliance

Manta WS120 is rigorously tested and fully complies with the following national and industry standards for structural protection:

JT/T 991-2015: Silane Paste for the Surface Protection of Bridge Concrete.

JC/T 2235-2014: Silane Protective Agents for Concrete.

GB/T 9755-2014: Synthetic Resin Emulsion Coatings for Exterior Walls (Note: Tested for system compatibility).

GB 50210-2001: Code for Acceptance of Construction Quality of Building Decoration.

JC/T 2273: Test Methods for Active Ingredients and Harmful Substances in Silane/Siloxane Building Protective Agents.