Manta WR-P01
Solid Silicone Water Repellent Powder (Potassium Methyl Siliconate)
Siliconates & Specialty Auxiliaries
Potassium Methyl Siliconate Solution | Manta MSEP
Manta MSEP is a water-reducible potassium methyl siliconate solution (CAS 31795-24-1) used as a penetrating water repellent for highly porous mineral substrates such as natural stone, terracotta, facing brick and exposed concrete. Compared with conventional sodium siliconates, its potassium-based chemistry significantly reduces the risk of white salt deposits.
- Grade
- MSEP
- Chemical Name
- Potassium methyl siliconate aqueous solution
- CAS No.
- 31795-24-1
- EINECS
- 250-807-9
- Synonyms
- Potassium Methylsilanetriolate; Methylsilanetriol potassium salt
- Form
- Colorless to light yellow transparent liquid
Overview
Manta MSEP is a water-reducible potassium methyl siliconate designed as a water repellent for highly porous mineral substrates. Its potassium-based chemistry significantly reduces the risk of white salt deposits (efflorescence) compared with sodium siliconates, which suits architectural surfaces where appearance matters.
After application and penetration into the substrate's capillary tract, the active siliconate reacts with atmospheric carbon dioxide (CO2) and builds an invisible, cross-linked polymethylsiloxane network within and across the treated surface. This insoluble network significantly reduces water absorption while maintaining the material's vapor permeability, and treated structures show good weatherability, anti-aging performance and resistance to dirt pick-up.
Manta MSES is the sodium-based counterpart, formulated for mass-scale integral treatment of building materials. On dark or highly decorative surfaces, where over-application of a sodium siliconate may leave a white carbonate residue, the potassium grade is recommended. For dry-mix formulations, potassium methyl siliconate is also available as a powder, Manta WR-P01.
Key Features
- Potassium-based chemistry with low efflorescence risk
- Reacts with atmospheric CO2 to form an insoluble polymethylsiloxane network
- Maintains the vapor permeability of the substrate
- Good weatherability and anti-aging performance
- Resistance to dirt pick-up on treated surfaces
- Concentrate can be diluted with tap water on site
Cross-Reference
Manta MSEP can be considered as an alternative to Wacker SILRES BS 16 and Dow XIAMETER OFS-0777 Siliconate.
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Specifications
| Property | Typical Value |
|---|---|
| Appearance | Colorless to light yellow transparent liquid |
| Solid Content | Customizable; typically 30%, 40%, 50% or 52% (± 2%) |
| Specific Gravity (25 °C) | 1.30 |
| pH | 13 |
| Flammability | Not flammable |
Typical values from the current Technical Data Sheet.
Applications
- Architectural and natural stone protection: low-efflorescence water repellent for natural marble, granite, terracotta, exposed concrete and porous facing bricks where the original appearance must be preserved
- Coatings and paint additives: water-borne architectural coatings and alkali silicate paints, improving hydrophobicity, weather resistance and color retention without compromising bond strength
- Oilfield and drilling: shale inhibitor and fluid modifier in oil drilling that adjusts mud viscosity; in enhanced oil recovery it is injected to stabilize formation integrity
- Wood and cellulosic treatments: a dilute solution neutralized with aluminum sulfate or aluminum nitrate acts as an impregnating agent, imparting water repellency and acting as a preservative for wood and fiberboards
Related applications: Concrete, Masonry & Stone Protection · Paints & Coatings
Packaging & Storage
Supplied in 50 kg, 250 kg drum, 1350 kg IBC.
Safety and Storage
Store in a cool, dry place and avoid direct sunlight. Keep containers tightly closed, as the product reacts with atmospheric carbon dioxide. Shelf life is 12 months from the date of production when stored at or below 25°C in the original unopened containers. The liquid is highly alkaline; avoid contact with skin and eyes and read the Safety Data Sheet before handling.
Documents
- Technical Data Sheet · PDF Download TDS
- SDS and COA · on request Request Documents
Frequently Asked Questions
Why choose potassium-based Manta MSEP over a sodium siliconate?
The potassium-based formulation significantly reduces the risk of white salt staining (efflorescence), so MSEP suits high-aesthetic surfaces such as marble, granite, terracotta, exposed concrete and porous facing bricks. Sodium-based Manta MSES is formulated for mass-scale integral treatment of building materials.
What concentrations is Manta MSEP supplied at?
Solid content: Customizable; typically 30%, 40%, 50% or 52% (± 2%). Specific gravity is 1.30 at 25 °C and pH is 13. The concentrate can be diluted with tap water directly on site.
How does Manta MSEP develop its water repellency?
After penetrating the capillary tract, the active siliconate reacts with atmospheric carbon dioxide and builds an invisible, cross-linked polymethylsiloxane network within and across the treated surface. The cured network is insoluble and maintains the material's vapor permeability.
Can Manta MSEP be used to protect wood?
Yes. When a dilute MSEP solution is precisely neutralized with aluminum sulfate or aluminum nitrate, it becomes an impregnating agent that imparts water repellency and acts as a preservative for wood and fiberboards.
Related Products
MSEP 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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