Silicone Emulsions & Fluids
100% Active Silane/Siloxane Concentrate | Manta WS290
Manta WS290 is a solvent-free, 100% active concentrate of silanes and modified polysiloxanes, diluted with hydrocarbon solvents to produce solvent-borne penetrating water repellents and primers. It treats clay brick, sand-lime brick, natural stone, exposed concrete and mineral plasters, including slightly damp or highly alkaline substrates, and serves as a hydrophobic primer for exterior acrylic or silicone resin paints.
- Grade
- WS290
- Chemical Name
- Silanes and modified polysiloxanes
- Form
- Light yellow liquid
Overview
Manta WS290 is a 100% active concentrate composed of silanes and highly modified polysiloxanes. The concentrate itself contains no solvent; it is designed to be diluted with organic solvents by the formulator and used as a water-repellent impregnator and primer for mineral substrates.
WS290 is miscible with aliphatic or aromatic hydrocarbon solvents and with dearomatized hydrocarbon solvents such as D40. Its low molecular weight gives high penetrating power into dense mineral matrices. Treated surfaces show initial and long-term water repellency with a pronounced water-beading effect and reduced dirt pick-up, while water vapor permeability is maintained and surface efflorescence is reduced. WS290 is formulated to perform on slightly damp or highly alkaline building materials, but it is not suitable for making gypsum renders water-repellent.
The main difference from Manta WS180 is the carrier. WS180 is an emulsion with an active content of approx. 50%, diluted with water for water-based impregnating agents, while WS290 is a concentrate diluted with hydrocarbon solvents. Unlike aqueous emulsions, WS290 is highly frost-resistant but very sensitive to humidity, so containers must be sealed immediately after dispensing.
Key Features
- 100% active, solvent-free concentrate for dilution in hydrocarbon solvents
- Initial and long-term water repellency
- Maintains water vapor permeability
- Pronounced surface water-beading effect
- Low molecular weight for high penetrating power into dense mineral matrices
- Reduces dirt pick-up and surface efflorescence
- Performs on slightly damp or highly alkaline building materials
Cross-Reference
Manta WS290 can be considered as an alternative to Wacker SILRES BS 290.
Trademarks are the property of their respective owners; no affiliation is implied.
Specifications
| Property | Typical Value |
|---|---|
| Appearance | Light yellow liquid |
| Active Content (%) | 100 |
| Density (20°C, g/cm³) | 0.97 |
Typical values from the current Technical Data Sheet.
Applications
- Solvent-borne water repellents: high-concentration base for penetrating impregnators
- Brick and stone: clay bricks, sand-lime bricks and natural stone
- Concrete and plasters: exposed concrete and mineral-based plasters and renders
- Hydrophobic primers: primer for exterior acrylic or silicone resin paints
Application Guidelines
- Dilution Requirement: Due to its 100% active concentration, WS290 must be diluted prior to application. Depending on the substrate's porosity, dilute at a ratio of 1:9 to 1:14 by weight.
- Suitable Solvents: Highly miscible with aliphatic or aromatic hydrocarbon solvents, as well as dearomatized hydrocarbon solvents (e.g., D40).
- Application Technique: Apply the diluted solution liberally and evenly to the absorbent surface using a brush, roller, or the flooding method. A wet-on-wet application is recommended for maximum penetration.
- Substrate Tolerance: Specially formulated to perform effectively even on slightly damp or highly alkaline building materials. It is not suitable for making gypsum renders water-repellent.
Related applications: Concrete, Masonry & Stone Protection · Paints & Coatings
Packaging & Storage
Supplied in 190 kg drum and 900 kg IBC.
Safety and Storage
Storage Conditions: Store in a cool, dry, and well-ventilated area away from direct sunlight, heat sources, and open flames. Unlike aqueous emulsions, this 100% active concentrate is highly frost-resistant but very sensitive to humidity.
Moisture Sensitivity (CRITICAL): This product reacts actively with atmospheric moisture to release small amounts of alcohol (ethanol/methanol). Prolonged exposure to air will cause premature cross-linking and irreversible damage. Ensure all containers are tightly sealed immediately after dispensing.
Hazard & Handling: The final diluted solutions (when mixed with hydrocarbon solvents) are highly flammable. Keep away from ignition sources and ensure adequate ventilation during application.
Shelf Life: 12 months when stored safely in original, unopened containers under recommended conditions.
Documents
- Technical Data Sheet · PDF Download TDS
- SDS and COA · on request Request Documents
Frequently Asked Questions
How should Manta WS290 be diluted before use?
WS290 is a 100% active concentrate and must be diluted before application, at 1:9 to 1:14 by weight depending on the porosity of the substrate. Suitable solvents are aliphatic or aromatic hydrocarbons and dearomatized hydrocarbon solvents such as D40.
Can WS290 be applied to damp or alkaline building materials?
Yes. WS290 is formulated to perform effectively even on slightly damp or highly alkaline building materials. Apply it by brush, roller or flooding; a wet-on-wet application is recommended for maximum penetration. It is not suitable for making gypsum renders water-repellent.
Why must WS290 containers be resealed immediately after dispensing?
WS290 reacts actively with atmospheric moisture and releases small amounts of alcohol (ethanol/methanol). Prolonged exposure to air causes premature cross-linking and irreversible damage. Unlike aqueous emulsions, the concentrate is highly frost-resistant but very sensitive to humidity.
When should I choose WS290 over WS180?
Choose WS290 when you are formulating solvent-borne water repellents and primers; it is a 100% active concentrate diluted in hydrocarbon solvents. WS180 is an emulsion with an active content of approx. 50%, diluted with water and used for water-based impregnating agents.
Are WS290 dilutions flammable?
Yes. The final solutions mixed with hydrocarbon solvents are highly flammable. Keep them away from ignition sources and ensure adequate ventilation during application.
Related Products
WS290 is one step in the building protection formulation chain. One inquiry can cover the other raw materials in your formulation, with samples, technical documents, quotation and shipment handled together.
- Alkyl Silane Actives
- Emulsions & Pastes
- Siliconate Liquids & Powders
- Waterproof Coatings
Looking for a different purity, functional group, or a structure not listed here? Contact our technical team.
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