Mineral wool production line applying phenolic resin binder
Silicone Water Repellents

Silicone Hydrophobizing Additive for Insulation | Manta WS513

Product Code: Manta WS513

Chemical Name Functional polysiloxane aqueous emulsion
Product Form Liquid
Synonyms Silicone Hydrophobizing Additive for Insulation Materials
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Technical Specifications

PARAMETER VALUE / RANGE
Appearance: Milky white liquid
Active Content(%) approx. 50
Specific Gravity(20℃, g/cm³) approx. 1

Product Description

Manta WS513 is a solvent-free aqueous emulsion of functional polysiloxanes (approx. 50% active content, specific gravity approx. 1) used as a mass hydrophobic additive in phenolic resin binders for rock wool and glass wool insulation. Comparable to Wacker SILRES BS 5137, it mixes directly into the binder at 0.5-1.0% by weight.

Manta WS513 is a solvent-free, highly efficient aqueous emulsion of functional polysiloxanes. It is specifically engineered as a mass hydrophobic additive for phenolic resin binders used in the insulation industry.

Equivalent to: Wacker SILRES® BS 5137.

 

Properties

  • Exceptional Hydrophobicity: Imparts outstanding, long-lasting water repellency to the finished insulation materials.
  • Highly Breathable: Maintains uncompromised water vapor permeability within the mineral fiber network.
  • Premium Compatibility: Exhibits excellent chemical and physical compatibility with standard phenolic resin binders.
  • Process Friendly: Can be seamlessly and directly incorporated into the phenolic resin mix without requiring complex emulsification steps.

Applications

Manta WS513 is a dedicated water-repellent additive for the industrial manufacturing of bonded mineral wool products. It is highly recommended for incorporating into the binder systems of:

  1. Rock wool (stone wool) insulation boards and rolls.
  2. Glass wool insulation products.
  3. Other mineral-fiber-based acoustic and thermal insulation materials.

 

Application Method

  • Mixing Procedure: Manta WS513 should be added directly into the formulated phenolic resin binder under continuous, gentle agitation.
  • Recommended Dosage: The optimal addition rate is between 0.5% and 1.0% by weight, calculated strictly relative to the total mass of the phenolic resin binder.

Packaging & Handling

Packaging

In 20-25kg/ Plastic drum, 180-200kg/Iron drum

 

Safety and Storage

Temperature Sensitivity: Manta WS513 is an aqueous emulsion sensitive to extreme temperatures. It must be stored indoors and strictly protected from frost and excessive heat.

Storage Range: Storage temperatures must be maintained between 5°C and 40°C. 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 application.

Shelf Life: 12 months when stored properly in original, unopened containers. It’s a non-hazardous substance for transport.

Support

Frequently Asked Questions

How is Manta WS513 dosed into a phenolic resin binder?

Add WS513 directly into the formulated phenolic binder under continuous, gentle agitation at 0.5% to 1.0% by weight, calculated strictly on the total mass of the binder. No complex emulsification steps are required.

Which insulation products is WS513 intended for?

WS513 is a dedicated water-repellent additive for bonded mineral wool manufacturing: rock wool (stone wool) boards and rolls, glass wool products, and other mineral-fiber acoustic and thermal insulation. It imparts long-lasting water repellency while maintaining the fiber network's vapor permeability.

Does WS513 need frost protection in storage?

Yes. As an aqueous emulsion it must be stored indoors between 5°C and 40°C; temperatures outside this range may cause irreversible phase separation. Shelf life is 12 months in unopened containers, and it is non-hazardous for transport.

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