Silicone Resin Emulsion Binder | Manta WS450

Manta WS450 is a solvent-free aqueous emulsion of modified polysiloxane resin (approx. 50% active content) used as a binder or co-binder in exterior silicone resin paints, plasters and silicate-based mineral paints. Comparable to Wacker SILRES BS 45, its alkali resistance keeps it stable in high-pH silicate formulations while maintaining vapor permeability.

Manta WS450 is a solvent-free aqueous emulsion of a modified polysiloxane resin. It is specifically engineered to function as the primary binder or co-binder in the formulation of premium exterior architectural coatings and silicone resin plasters.

Equivalent to Wacker SILRES® BS 45.

Properties

• Exceptional Water Repellency: Provides durable, highly effective moisture protection.
• Highly Breathable: Maintains extremely high water vapor permeability, allowing building facades to “breathe”.
• Aesthetic Preservation: Exhibits excellently low dirt pick-up, ensuring long-lasting facade cleanliness.
• Early Rain Resistance: Rapidly develops water resistance shortly after coating application.
• Robust Film-Forming: Forms a resilient, microporous silicone resin network.
• High Alkali Resistance: Perfectly stable in high-pH environments, highly compatible with silicate-based formulations.
• Eco-Friendly: 100% solvent-free, water-borne system.

Manta WS450 acts as a core hydrophobic binder in silicone resin paints and elastomeric plasters. It delivers the optimal balance of driving-rain protection and vapor transmission. Furthermore, owing to its outstanding alkali resistance, it is highly recommended as a modifying co-binder for sodium silicate paints (mineral paints) to significantly upgrade their water repellency.

Formulation Guidelines

During the manufacturing process, Manta WS450 is typically incorporated into the water-based coating formulation at the following dosages (calculated by weight relative to the total formulation):

Silicone Resin Paints: 4.0% – 10.0%

Silicone-Modified Acrylic Paints: 2.0% – 4.0%

Silicone Resin Plasters / Renders: 2.0% – 6.0%

SiSi Plasters (Silicate/Silicone Hybrid Renders): 2.0% – 4.0%

Formulator’s Tip: While Manta WS450 provides an exceptional microporous water-repellent network, to achieve an ultimate surface water-beading (lotus) effect, we strongly recommend formulating it in combination with 1.0% – 3.0% of Manta WS136 (Water-Repellent Additive).