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

Dow DOWSIL 993 Structural Glazing Base and Catalyst

Dow DOWSIL 993 Structural Glazing Base and Catalyst is a two-component silicone adhesive system designed for high-performance structural glazing applications. It delivers excellent adhesion to glass, aluminum, and coated substrates, outstanding UV resistance, and long-term durability under extreme weather conditions. The base and catalyst cure at room temperature to form a flexible, resilient bond meeting ASTM C1184 standards.
  • dow dowsil 993 structural glazing base and catalyst_e8901fc5
  • dow dowsil 993 structural glazing base and catalyst_e8901fc5

Features Of Dow DOWSIL 993 Structural Glazing Base and Catalyst

  1. Two-component, high-performance silicone adhesive system designed specifically for structural glazing applications.

  2. Excellent adhesion to glass, anodized aluminum, and other common architectural substrates without primers.

  3. Superior UV resistance and long-term durability under cyclic thermal, moisture, and mechanical stress.

  4. Controlled pot life and predictable cure profile for reliable shop or field application.

  5. Meets ASTM C1184 and ISO 11600 standards for structural silicone sealants.

Typical Applications Of Dow DOWSIL 993 Structural Glazing Base and Catalyst

  1. Structural bonding of insulating glass units (IGUs) to curtain wall framing systems.

  2. Point-supported glass façades and spider-fitted architectural glazing assemblies.

  3. Weather-sealed structural joints in commercial high-rise building envelopes.

  4. Bonding of vision glass and spandrel panels in unitized curtain wall systems.

Specifications Of Dow DOWSIL 993 Structural Glazing Base and Catalyst

Chemical TypeAcetoxy-cure silicone elastomer system
Product FormTwo-part: Base (white paste) + Catalyst (liquid)
AppearanceBase: Off-white viscous paste; Catalyst: Clear to pale yellow liquid
Primary ApplicationsStructural glazing, façade bonding, architectural silicone sealant
Key FeaturesHigh modulus, excellent adhesion, weather-resistant, primerless on select substrates
BenefitsReduced labor cost via primerless bonding, consistent performance across temperature ranges, proven field reliability
Storage ConditionsStore at 5–25°C (41–77°F); protect from freezing and direct sunlight
Shelf Life12 months from date of manufacture when stored properly


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