Silicone water repellents come in the delivery forms construction-chemical formulators use: alkyl silanes, silane and siloxane emulsions, siliconates, hydrophobic powders and silicone resin emulsions. Choose by substrate, active content and application method.
- Concrete and masonry treatments are selected by penetration target and application method.
- Gypsum and mineral binders use compatible additives for integral water repellency.
- Facade paints and renders use silicone resin emulsions for water beading with vapor permeability.
- Siliconates provide an economical option for suitable mineral substrates.
Confirm dosage, dilution, mix order and storage conditions on the TDS, then run a substrate or formulation trial before production use.
Comparing forms? Use the Water Repellent Selection Guide.
Silanes & Alkyl Silanes
Neat alkyl silanes penetrate mineral substrates and serve as actives for water-repellent formulations and as filler treatments. Chain length and branching set the balance of penetration and hydrophobicity: isobutyl (Manta LB320), n-octyl (Manta L310 and Manta L320), isooctyl (Manta LO320) and long-chain C12, C16 and C18 grades. Manta LO320E is a thixotropic paste for thick, single-coat application on vertical and overhead surfaces.
| Grade | Chemical Name | CAS | Hydrolyzable Group | Purity | Density | TDS |
|---|---|---|---|---|---|---|
| L310 | N-Octyltrimethoxysilane | 3069-40-7 | Methoxy (x3) | 98.0 min | 0.902~0.912 | |
| L320 | N-Octyltriethoxysilane | 2943-75-1 | Ethoxy (x3) | 98.0 min | 0.874 ~ 0.884 | |
| L1231 | n-Dodecyltrimethoxysilane | 3069-21-4 | Methoxy (x3) | 98.0 min | 0.885~0.895 | |
| L1232 | n-Dodecyltriethoxysilane | 18536-91-9 | Ethoxy (x3) | 96.0 min | 0.885~0.895 | |
| L1631 | Hexadecyltrimethoxysilane | 16415-12-6 | Methoxy (x3) | 95.0 min | 0.89±0.01 | |
| L1831 | Octadecyltrimethoxysilane | 3069-42-9 | Methoxy (x3) | 92.0 min | Approx.0.883 | |
| LB320 | iso-Butyltriethoxysilane | 17980-47-1 | Ethoxy (x3) | 98.0 min | 0.8800 ± 0.0050 | |
| LO320 | isooctyltriethoxysilane | 35435-21-3 | Ethoxy (x3) | 98.0 min | 0.879 | |
| LO320E | Isooctyltriethoxysilane paste | – | Ethoxy (x3) | – | About 0.90 g/cm3 |
Silicone Emulsions & Fluids
Water-based and neat silicone actives for impregnation, integral waterproofing and coatings. The series includes silane/siloxane emulsions such as Manta WS100 and Manta WS400, deep-penetrating grades such as Manta WS101 and Manta WS120, silicone resin emulsions for architectural coatings (Manta WS450 and Manta WS600), the waterproofing admixture Manta WS170, the fluorine-free emulsion Manta WS370 and methyl hydrogen silicone products such as Manta H101.
| Grade | Chemical Name | Form | Active Content | pH | Density | TDS |
|---|---|---|---|---|---|---|
| H101 | Polymethylhydrogensiloxane / Hydrogen silicone fluid | – | – | – | – | |
| EH101 | Methyl hydrogen polysiloxane emulsion | Milky white liquid | 30 ± 2% (other solid contents can be customized) | 4–6 | – | |
| EH102 | Hydroxyl-Terminated PDMS Emulsion | Milky white liquid | Approx. 50% | 6.0-7.0 | 1.0 | |
| WS100 | Emulsion based on silane and modified polysiloxane | Milky white or white liquid | approx. 50 | – | approx. 0.95 | |
| WS101 | Penetrating Silane-Based Emulsion Deep-Penetrating Silane Emulsion | Milky, white liquid | 43 ~ 58 | – | – | |
| WS120 | Nanoscale penetrating water repellent (Deep-penetrating silane cream) Water-based silane emulsion paste | White paste/cream | ≥ 40% | – | About 0.86 g/cm3 | |
| WS130 | – | – | – | – | – | |
| WS136 | Aqueous emulsion of functional polysiloxane | Milky white to white liquid | Approx 50% by weight | Approx 9 | Approx 1 | |
| WS170 | – | Milky white aqueous dispersion. It will not alter the original appearance or color of the substrate after application. | ≥ 40% | 5.0 – 7.0 | – | |
| WS180 | Silane and modified polysiloxane emulsion | Milky white liquid | approx. 50 | – | approx. 0.95 | |
| WS290 | Silanes and modified polysiloxanes | Light yellow liquid | 100 | – | 0.97 | |
| WS360 | Emulsion of organically modified silanes and siloxanes | Milky white liquid | approx. 50 | – | approx. 0.95 | |
| WS370 | – | Translucent milky white liquid | – | 4-7 | – | |
| WS400 | Cationic silane/polysiloxane emulsion | Milky white liquid | approx. 50 | approx. 4.0-6.0 | approx. 1 | |
| WS450 | Aqueous emulsion of modified polysiloxane resin | Milky white liquid | approx. 50 | – | approx. 1 | |
| WS513 | Functional polysiloxane aqueous emulsion | Milky white liquid | approx. 50 | – | approx. 1 | |
| WS600 | Aqueous emulsion of modified polysiloxane resin | Milky white liquid | approx. 50 | approx. 9 | approx. 1 |
Siliconates & Specialty Auxiliaries
Manta MSEP and Manta MSES are potassium and sodium methyl siliconate solutions for mineral substrates. Manta WR-P01 and Manta WR-P02 are solid water repellents for dry-blending, including gypsum powders and lightweight aggregates. Manta WS114 and Manta WS115 are concentrated impregnators, and Manta WS168 is a silicone-based pH adjuster for architectural coatings.
| Grade | Chemical Name | Form | Active Content | pH | Density | TDS |
|---|---|---|---|---|---|---|
| MSEP | Potassium methyl siliconate aqueous solution | Colorless to light yellow transparent liquid | Customizable; typically 30%, 40%, 50% or 52% (± 2%) | 13 | 1.30 | |
| MSES | Sodium methyl siliconate | Colorless or light yellow transparent liquid | 30% ± 2% | ≥13 | 1.10 - 1.30 | |
| WR-P01 | Potassium methyl siliconate powder | White to off-white powder | ≥ 98% | 12-13 | – | |
| WR-P02 | Sodium methyl siliconate powder | White Powder | ≥ 90% | 12-14 | – | |
| WS114 | Aqueous Alkali Metal Methyl Siliconate | Colorless or light yellow transparent liquid | 30% | ≥12.5 | 1.10-1.30 | |
| WS115 | Aqueous Alkali Metal Methyl Siliconate | Colorless transparent liquid | 30% | 13 | 1.1 | |
| WS168 | Aqueous solution of methylsiliconates | Clear to slightly hazy, colorless liquid | approx. 50 | 13.0 - 14.0 | approx. 1.4 |
Fluoro-Silanes
Fluoroalkyl silanes give surfaces both water and oil repellency. Manta F1331 and Manta F1332 carry a tridecafluorooctyl chain, and Manta F1731 and Manta F1732 carry a longer heptadecafluorodecyl chain. These substances are regulated as PFAS in a growing number of markets, and the rules differ by chain length and end use. Each product page summarizes the position; availability for your destination is confirmed at inquiry.
| Grade | Chemical Name | CAS | Hydrolyzable Group | Purity | Density | TDS |
|---|---|---|---|---|---|---|
| F1331 | 1H,1H,2H,2H-Perfluorooctyltrimethoxysilane | 85857-16-5 | Methoxy (x3) | 97.0 min | 1.453±0.005 | |
| F1332 | 1H,1H,2H,2H-Perfluorooctyltriethoxysilane | 51851-37-7 | Ethoxy (x3) | 97.0 min | Approx. 1.330 | |
| F1731 | 1H,1H,2H,2H-Perfluorodecyltrimethoxysilane | 83048-65-1 | Methoxy (x3) | 97.0 min | 1.5±0.1 | |
| F1732 | 1H,1H,2H,2H-Perfluorodecyltriethoxysilane | 101947-16-4 | Ethoxy (x3) | 97.0 min | 1.384±0.005 |
Frequently Asked Questions
Which form of water repellent should I choose?
Choose by substrate, active content and application method. Neat alkyl silanes penetrate mineral substrates, water-based emulsions are used in impregnating agents, and siliconates are an economical option for suitable mineral substrates. The Water Repellent Selection Guide compares the options.
Do these treatments stop the substrate from breathing?
Penetrating silane and siloxane treatments reduce water uptake while keeping the substrate open to water vapor. In facade paints and renders, silicone resin emulsions give water beading with vapor permeability.
Do I need a trial before using a water repellent?
Yes. Confirm dosage, dilution, mix order and storage conditions on the TDS, then run a substrate or formulation trial before production use.
Talk to our technical team
Tell us your application, target properties and estimated quantity. We will suggest grades and arrange documents or samples.