DOWSIL™ 999A Silicone Glazing Sealant 10.3oz Cartridge


An easily applied, one-part sealant that cures in the presence of atmospheric moisture to produce a durable and flexible glazing and curtainwall seal.

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Technical Data Sheet

  • DOWSIL™ 999-A Building and Glazing Sealant is intended for general construction applications; may be applied as a primary seal to most glass, plastic and metal assemblies if tested and shown to be acceptable for the intended use
  • Resistant to sunlight, rain, sleet, snow, ultraviolet radiation, ozone and temperature extremes
  • Retains design properties even after years of exposure – seals remain watertight and weatherproof
  • Wide service temperature range from -60 to 177°C (-76 to 350°F) with intermittent temperatures up to 200°C (392°F)
Typical Properties
Adhesion to Alodine Aluminum, Aluminum, Anodized Aluminum, Ceramic Tiles, Glass, Heat Strengthened Glass, Low E Coated Glass, Metal, Paint, Steel
Appearance Translucent
Chemistry Acetoxy
Color Aluminum, Black, Bronze, Clear, Custom, Light Bronze, White
Durometer - Shore A 25
Movement Low
Peel Strength 20 ppi
Resistance Type UV, Water
Substrate Non-porous
Tear Strength 25 ppi
Tensile Strength 325 psi
Volatile Organic Content 40 g/liter
Application Benefits
Primerless Adhesion Primerless
Processing-Formulating Benefits
Cure System 1-Part Cure
Cure Type Condensation Cure
Where Used Job Site

Additional information

Weight 1.3 lbs
Dimensions 1 × 1 × 1 in

Aluminum, Black, Bronze, Clear, White