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

Dow DOWSIL 790 Silicone Building Sealant

Dow DOWSIL 790 Silicone Building Sealant is a high-performance, acetoxy-cure silicone sealant designed for structural glazing and façade applications. It offers excellent adhesion to glass, aluminum, and anodized surfaces without primer, superior weather resistance, UV stability, and long-term durability in demanding architectural environments.
  • dow dowsil 790 silicone building sealant_da10586a
  • dow dowsil 790 silicone building sealant_da10586a

Features Of Dow DOWSIL 790 Silicone Building Sealant

  1. Acetoxy-cure silicone formulation offering rapid surface cure and excellent adhesion to common building substrates without primer.

  2. Excellent resistance to weathering, UV radiation, ozone, and extreme temperature fluctuations (–40 °C to +150 °C).

  3. Low modulus elasticity provides high movement capability (±25% joint movement) while maintaining long-term seal integrity.

  4. Non-staining, non-corrosive, and compliant with ASTM C920 Type S, Grade NS, Class 25, Use NT, M, and T.

  5. Low VOC content, meeting stringent indoor air quality requirements including GREENGUARD Gold certification.

Typical Applications Of Dow DOWSIL 790 Silicone Building Sealant

  1. Perimeter sealing of insulating glass units (IGUs) in commercial façades and curtain walls.

  2. Sealing of expansion joints in precast concrete, aluminum, and stone cladding systems.

  3. Weatherproofing of window and door perimeters in residential and light commercial construction.

  4. Joint sealing in architectural metal panel systems and composite wall assemblies.

  5. Interior and exterior glazing applications where high durability and optical clarity are required.

Specifications Of Dow DOWSIL 790 Silicone Building Sealant

Chemical TypeAcetoxy-cure silicone elastomer
Product FormThixotropic paste, single-component
AppearanceOpaque white, off-white, or clear (depending on variant)
Primary ApplicationsStructural and non-structural perimeter glazing; architectural joint sealing
Key FeaturesPrimerless adhesion, fast skin-over, high movement accommodation
BenefitsReduced labor time, long service life, consistent performance across climates
ComplianceASTM C920 Type S, Grade NS, Class 25; ISO 11600 F25HM; GREENGUARD Gold
Shelf Life12 months from date of manufacture when stored unopened at ≤25 °C


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