Siliconates & Specialty Auxiliaries
Potassium Siliconate Water Repellent Powder | Manta WR-P01
Manta WR-P01 is a solid silicone water repellent based on potassium methyl siliconate, supplied as a water-soluble white powder. It is used as an integral water repellent in dry-mix mortars, tile grouts, wall putties and EIFS, and can be dissolved on site to produce a liquid surface water repellent for absorbent mineral substrates.
- Grade
- WR-P01
- Chemical Name
- Potassium methyl siliconate powder
- Form
- White to off-white powder
Overview
Manta WR-P01 is a solid silicone water repellent based on highly concentrated potassium methyl siliconate. It is supplied as a fine, water-soluble powder that is dry-blended into cementitious formulations or dissolved in water for surface treatment.
Unlike pore-blocking crystalline waterproofing, WR-P01 works through a moisture- and CO2-activated reaction. On contact with water and atmospheric carbon dioxide it dissolves and reacts to form an insoluble, cross-linked polymethylsiloxane resin network that bonds covalently to the silicate pores, neutralizing capillary suction and building a three-dimensional moisture barrier while maintaining the vapor permeability of the substrate.
Manta WR-P02 is the sodium methyl siliconate powder for dry-mix formulations. WR-P01 is the potassium grade and has the higher specified solid content (≥ 98% against ≥ 90%). For a liquid potassium methyl siliconate, see Manta MSEP.
Key Features
- Potassium methyl siliconate in water-soluble powder form
- Activated by water and atmospheric CO2
- Forms an insoluble polymethylsiloxane network bonded to silicate pores
- Neutralizes capillary suction while maintaining vapor permeability
- Dry-blends with cement, sand and aggregates before water is added
- Can be dissolved on site to make a liquid water repellent
Cross-Reference
Manta WR-P01 can be considered as an alternative to Wacker SILRES BS Powder S.
Trademarks are the property of their respective owners; no affiliation is implied.
Specifications
| Property | Typical Value |
|---|---|
| Appearance | White to off-white powder |
| Solid Content | ≥ 98% |
| Methylsilsesquioxane Content (as CH3SiO1.5) | 70% |
| pH(in 10% solution) | 12-13 |
| Flammability | Not flammable |
Typical values from the current Technical Data Sheet.
Applications
- Dry-mix mortars and tile grouts: integral water repellent for tile grouts, joint fillers and decorative stucco, imparting long-lasting hydrophobicity and helping to limit efflorescence (white salt staining)
- Exterior wall putty and EIFS: additive for exterior wall putty powders and Exterior Insulation and Finish Systems, protecting facades from driving rain while preserving vapor permeability
- High-absorbent inorganic aggregates: dry-blending with porous lightweight aggregates such as expanded perlite, gypsum powders and thermal insulation materials to add moisture protection
- On-site liquid water repellent: dissolved in water on the construction site to produce a surface water repellent, reducing shipping and logistics costs compared with pre-mixed liquids
Application Guidelines & Dosage
A. Integral Waterproofing (Dry-Mix Addition)
Dosage: Typically 0.2% to 0.5% by total weight of cement/binder.
Mixing: Thoroughly dry-blend the WR-P01 powder with cement, sand, and other aggregates to ensure homogeneous dispersion before adding the mixing water. Proceed with standard placement and curing methods.
B. Leakage Repair & Patching Mortar
Prepare a waterproof mortar by adding 0.4% WR-P01 (by weight of cement).
Clean and roughen the concrete surface. (Note: Active, flowing leaks must be stopped with a rapid-setting hydraulic cement plug prior to mortar application). Apply the treated mortar in layers.
C. Surface Spray Coating (Anti-Seepage)
Dilution: Dissolve 1 part WR-P01 powder thoroughly into about 50 parts of clean water (by weight).
Application: Spray or brush the solution directly onto absorbent inorganic substrates (concrete, fired bricks, roof tiles) to create an immediate moisture-proof barrier.
Related applications: Liquid Waterproofing & Construction
Packaging & Storage
Supplied in 25 kg bags. This agent dissolves in water. During transportation, pay attention to waterproofing and moisture-proofing to prevent rain and packaging damage. Store in a dry environment at -20 to 40°C, with a shelf life of 24 months.
Documents
- Technical Data Sheet · PDF Download TDS
- SDS and COA · on request Request Documents
Frequently Asked Questions
How much Manta WR-P01 goes into a dry-mix mortar?
The typical dosage is 0.2% to 0.5% by total weight of cement or binder. For leakage-repair patching mortar, add 0.4% by weight of cement. Dry-blend the powder thoroughly with cement, sand and aggregates before adding the mixing water, then proceed with standard placement and curing.
Can I make a liquid water repellent from Manta WR-P01 on site?
Yes. Dissolve 1 part powder thoroughly into about 50 parts of clean water by weight, then spray or brush the solution onto absorbent substrates such as concrete, fired bricks or roof tiles. Making the liquid on site reduces shipping and logistics costs compared with pre-mixed liquids.
How does Manta WR-P01 differ from crystalline pore-blocking waterproofing?
Instead of blocking pores, it reacts with water and atmospheric carbon dioxide to form an insoluble polymethylsiloxane network that bonds covalently to silicate pores, neutralizing capillary suction while maintaining vapor permeability.
Should I pick Manta WR-P01 or Manta WR-P02 for my formulation?
WR-P01 is the potassium methyl siliconate powder, with a specified solid content of ≥ 98%, and is used in tile grouts and stucco where limiting efflorescence matters. WR-P02 is the sodium-based powder, with a specified solid content of ≥ 90%, and also covers cementitious waterproofing slurries. Confirm the choice with trials in your own mix.
How should Manta WR-P01 be stored and transported?
Store it in a dry environment at -20 to 40°C, with a shelf life of 24 months. Because the powder dissolves in water, protect the packaging from rain and moisture during transport.
Related Products
WR-P01 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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