Silicone Emulsions & Fluids
Silicone Resin Emulsion Binder | Manta WS450
Manta WS450 is a solvent-free aqueous emulsion of a modified polysiloxane resin, used as the primary binder or co-binder in exterior silicone resin paints and silicone resin plasters. Its high alkali resistance also makes it a modifying co-binder for sodium silicate mineral paints, where it significantly improves water repellency.
- Grade
- WS450
- Chemical Name
- Aqueous emulsion of modified polysiloxane resin
- Form
- Milky white liquid
Overview
Manta WS450 is a solvent-free aqueous emulsion of a modified polysiloxane resin, with an active content of approx. 50%. It is designed to function as the primary binder or co-binder in exterior architectural coatings and silicone resin plasters, where it forms a resilient, microporous silicone resin network.
The binder gives durable moisture protection with very high water vapor permeability, low dirt pick-up and rapid development of water resistance shortly after application. Because it is very stable in high-pH environments and compatible with silicate-based formulations, it is also recommended as a modifying co-binder for sodium silicate paints to significantly improve their water repellency.
On its own, WS450 gives a microporous water-repellent network. For a pronounced surface water-beading effect, its TDS recommends formulating it with Manta WS136, a water-repellent additive. Manta WS600 is a closely related binder with the same recommended dosage ranges, based on a highly reactive modified polysiloxane resin.
Key Features
- Primary binder or co-binder for exterior coatings and plasters
- Forms a resilient, microporous silicone resin network
- Durable moisture protection
- Very high water vapor permeability
- Low dirt pick-up
- Rapid development of early rain resistance
- High alkali resistance; compatible with silicate-based formulations
- Solvent-free, water-borne system
Cross-Reference
Manta WS450 can be considered as an alternative to Wacker SILRES BS 45.
Trademarks are the property of their respective owners; no affiliation is implied.
Specifications
| Property | Typical Value |
|---|---|
| Appearance | Milky white liquid |
| Active Content (%) | approx. 50 |
| Density (20°C, g/cm³) | approx. 1 |
Typical values from the current Technical Data Sheet.
Applications
- Silicone resin paints: core hydrophobic binder balancing driving-rain protection and vapor transmission
- Silicone resin plasters and renders: core hydrophobic binder for exterior plaster systems
- Silicone-modified acrylic paints: added to water-based acrylic coating formulations
- SiSi plasters: silicate/silicone hybrid renders
- Sodium silicate (mineral) paints: modifying co-binder to improve 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 a pronounced surface water-beading (lotus) effect, we strongly recommend formulating it in combination with 1.0% – 3.0% of Manta WS136 (Water-Repellent Additive).
Related applications: Paints & Coatings
Packaging & Storage
Supplied in 190 kg drum and 950 kg IBC.
Safety and Storage
Temperature Sensitivity: Manta WS450 is an aqueous emulsion highly sensitive to frost and extreme heat. Store indoors at temperatures strictly between 5°C and 40°C.
Storage Risks: Exposure to temperatures outside this range may cause irreversible emulsion breakage (phase separation).
Quality Verification: In the event of suspected frost or heat damage, the viability and homogeneity of the product must be thoroughly verified prior to any formulation or application.
Shelf Life: 12 months when stored properly in original, unopened containers. It is classified as a non-hazardous substance.
Documents
- Technical Data Sheet · PDF Download TDS
- SDS and COA · on request Request Documents
Frequently Asked Questions
What dosage of Manta WS450 is used in different coating types?
Dosage is calculated by weight relative to the total formulation. Use 4.0% – 10.0% in silicone resin paints, 2.0% – 6.0% in silicone resin plasters and renders, and 2.0% – 4.0% in silicone-modified acrylic paints and SiSi plasters.
How can I boost the water-beading effect of a WS450-based coating?
WS450 provides a microporous water-repellent network. To achieve a pronounced surface water-beading effect, formulate it with 1.0% – 3.0% of Manta WS136 water-repellent additive.
Is WS450 suitable for sodium silicate (mineral) paints?
Yes. Owing to its high alkali resistance, WS450 is very stable in high-pH environments and is recommended as a modifying co-binder for sodium silicate paints to significantly upgrade their water repellency.
What packaging and shelf life does WS450 have?
WS450 is supplied in 190 kg drum and 950 kg IBC. Shelf life is 12 months when stored properly in original, unopened containers, indoors at temperatures between 5°C and 40°C.
Related Products
WS450 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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