DOWSIL 791 Black 20oz Sausage

DOWSIL 791 Black 20oz Sausage

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SKU: D791BLS
Brand: Dowsil
A medium-modulus, neutral-cure silicone providing ±50% movement capability and long-term durability for glazing and façade weathersealing joints.

SHIPS WITHIN 24-HOURS, IF IN-STOCK.

$50 MINIMUM ORDER VALUE

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Technical Data Sheet

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$13.03

DOWSIL™ 791 Weatherproofing Sealant Black 20oz Sausage is a one-part, neutral-cure, medium-modulus silicone sealant engineered for high-performance architectural weathersealing. Designed for glazing, curtain wall, and building façade joints, it cures at ambient temperatures to form a durable, flexible silicone rubber seal that performs reliably in demanding exterior environments.

This premium weathersealing sealant offers excellent unprimed adhesion to a wide range of porous and non-porous substrates, including coated glass, galvanized steel, masonry, and other common construction materials. With ±50% joint movement capability and exceptional resistance to sunlight, rain, snow, ozone, and temperature extremes, DOWSIL™ 791 delivers long-term performance with minimal maintenance.

Formulated with low embodied carbon DOWSIL™ Silicone, this product supports sustainability and green building initiatives, offering externally verified carbon neutrality (PAS 2060) and contributing toward green building certification credits when specified for façade applications.

Sold individaully, for a full case add 16 sausages to your cart. 

  • High-Movement Capability – Accommodates joint movement up to ±50%
  • Excellent Weatherability – Virtually unaffected by sunlight, moisture, ozone, or snow
  • Superior Adhesion – Bonds to coated glass, masonry, metals, and other construction materials without primer
  • Easy Application – Ready to use with smooth gunning and low stringing
  • Medium-Modulus Performance – Ideal balance of flexibility and joint stability
  • Sustainability Focused – Supports carbon reduction goals and green building certification credits

  • Product Type: Silicone weatherproofing sealant

  • Chemistry: One-part, neutral-cure, RTV silicone

  • Modulus: Medium-modulus

  • Movement Capability: ±50%

  • Application: General weathersealing, glazing, curtain wall and façade joints

  • Adhesion: Excellent unprimed adhesion to porous and non-porous substrates

  • Weather Resistance: Resistant to UV, rain, snow, ozone, and temperature extremes

  • Odor: Low

  • Sustainability: Low embodied carbon DOWSIL™ Silicone; PAS 2060 verified carbon neutrality (project-specific certificate available)

  • Color Options: Available in multiple colors