Guangzhou Eric Wei Chemical Co., Ltd.
Guangzhou Eric Wei Chemical Co., Ltd.

Wacker SILRES BS SMK 2101 Silane/Siloxane

Wacker SILRES BS SMK 2101 is a silane/siloxane-based hydrophobic impregnation agent from Wacker’s SILRES BS series, designed for deep-penetration water repellency in mineral building materials without altering surface appearance or vapor permeability.
  • wacker silres bs smk 2101 silane siloxane_14026cf1
  • wacker silres bs smk 2101 silane siloxane_14026cf1

Features Of Wacker SILRES BS SMK 2101 Silane/Siloxane

  1. Hybrid silane-siloxane chemistry enabling both covalent substrate bonding and hydrophobic network formation.

  2. Water-dilutable formulation for easy integration into aqueous systems without organic solvents.

  3. Low-VOC and APEO-free, supporting sustainable building material and coating formulations.

  4. Excellent alkali resistance—stable in cementitious environments up to pH 13.

  5. Rapid hydrophobization with durable water repellency on mineral substrates after curing.

Typical Applications Of Wacker SILRES BS SMK 2101 Silane/Siloxane

  1. Water-repellent additives for exterior renders and plasters.

  2. Hydrophobic treatment agent for concrete repair mortars and grouts.

  3. Functional additive in tile adhesives and polymer-modified cement coatings.

  4. Surface protection component in facade paints and mineral-based façade systems.

  5. Moisture management enhancer in lightweight aggregate concretes and EIFS basecoats.

Specifications Of Wacker SILRES BS SMK 2101 Silane/Siloxane

Chemical TypeAlkoxysilane / Hydrolyzed Siloxane Hybrid
Product FormAqueous dispersion
AppearanceClear to slightly opalescent liquid
pH (1% aqueous solution)4.5 – 5.5
Solids Content20.0 – 22.0 wt-%
Density (20 °C)1.01 – 1.03 g/cm³
Viscosity (20 °C, Brookfield RV)10 – 30 mPa·s
Storage Stability≥ 6 months at 5–30 °C in sealed container


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