Methyl Hydrogen Silicone Emulsion | Manta EH101

Manta EH101 is a water-based methyl hydrogen polysiloxane emulsion (20–50% solid content, customizable; pH 3.0–4.0) used as a mass water repellent for gypsum plasterboard, textiles, glass fiber and cementitious materials. It is comparable to DOWSIL 2-7887 Emulsion and emulsified forms of SILRES BS 94 and TSF484, offering a solvent-free, low-VOC alternative to pure silicone fluids.

Manta EH101 is a water-based emulsion of methyl hydrogen polysiloxane. Because its molecular structure contains active silicon-hydrogen (Si-H) bonds, it can easily cross-link under the action of catalysts or heat to form a durable, highly effective water-repellent film on the surface or deep within substrates.

As an aqueous emulsion, Manta EH101 is an environmentally friendly, solvent-free alternative to traditional pure silicone fluids. It offers excellent dispersibility in water, low VOC emissions, and ease of application while maintaining the high vapor permeability (breathability) of the treated materials.

Equivalent to: DOWSIL™ 2-7887 Emulsion, and emulsified forms of SILRES® BS 94 / TSF484.

Because Manta EH101 molecular structure contains active silicon-hydrogen (Si-H) bonds, it can easily cross-link under the action of catalysts or heat to form a durable, highly effective water-repellent film on the surface or deep within substrates.

As an aqueous emulsion, Manta EH101 is an environmentally friendly, solvent-free alternative to traditional pure silicone fluids. It offers excellent dispersibility in water, low VOC emissions, and ease of application while maintaining the high vapor permeability (breathability) of the treated materials.

Equivalent to: DOWSIL™ 2-7887 Emulsion, and emulsified forms of SILRES® BS 94 / TSF484.

Manta EH101 is highly versatile and widely used across several key industries:

• Gypsum & Plasterboard Waterproofing: Added directly to the gypsum slurry (mixing water) to provide excellent mass water repellency for moisture-resistant plasterboards and gypsum blocks.
• Textile & Fabric Treatment: Used in textile finishing to impart durable water repellency (DWR), softness, and improved tear strength to synthetic and natural fabrics.
• Glass Fiber & Mineral Wool: Applied as a protective coating to prevent moisture absorption and improve the structural integrity of insulation materials.
• Construction Materials: Used as a water-repellent admixture or primer for cement, concrete, and porous mineral substrates.

Application Method

Manta EH101 can be applied via admixture (in-mass), spraying, or padding processes.

1. Dilution & Preparation: For surface treatments, dilute EH101 with clean water to the desired working concentration. Tip: Always add the emulsion to the water slowly with gentle agitation; never add water directly into the concentrated emulsion.

2. In-Mass Addition (Admixture): For plasterboards or concrete, add the emulsion directly into the gauging water. The recommended dosage is typically 0.2% to 0.8% based on the dry weight of the substrate.
3. Surface Coating & Padding: For textiles or glass fibers, apply via a standard pad-dry-cure process. To accelerate Si-H cross-linking and achieve optimal DWR, a suitable catalyst (zinc or tin-based) and heat curing (120°C – 160°C) are highly recommended.
4. Chemical Incompatibility: Avoid mixing the emulsion with strong alkalis, bases, heavy metal salts, or oxidizing agents, as this will destroy emulsion stability and cause violent release of hydrogen gas.