DOWSIL™ 790 Silicone Building Sealant 20oz Sausage


An ultra-low-modulus, one-part silicone elastomeric sealant designed for high-movement weather sealing applications. This product boasts exceptional primerless adhesion to concrete and most porous substrates, offering versatility across various surfaces. Available in a diverse range of colors to suit your aesthetic preferences.

SKU: N/A Categories: ,


  • Weathersealing joints between natural stone surfaces.
  • Weathersealing curtainwall and mullion joints.
  • Expansion and control joints in various construction projects.
  • Weathersealing joints in precast concrete panels and other construction elements.


  • Suitable for porous substrates, ensuring effective sealing.
  • Demonstrates excellent unprimed adhesion to masonry, concrete, and natural stone surfaces.
  • Low-staining and free from plasticizers, maintaining the aesthetic integrity of surfaces.
  • Ultra-low-modulus formulation enables superior flexibility.
  • Offers extension/compression joint movement capability of +100%/-50%, accommodating substantial structural shifts.
  • Exceptional performance, even in building joints subjected to extreme movement.
  • Compliant with ISO 11600F-25LM standards, ensuring reliability.
  • Exhibits excellent weathering properties and resistance to sunlight, rain, snow, and temperature extremes.
  • Easy application across a wide temperature range, enhancing convenience during installation.
Typical Properties
Adhesion to Brickwork, Ceramic, Concrete, Extruded Mill Finish, Glass, Granite, Heat Strengthened Glass, Light-Weight Stone Panels, Limestone, Low E Coated Glass, Marble, Masonry, Paint, Silicone, Stone, Wood
Appearance Opaque
Chemistry Neutral
Color Adobe Tan, Black, Blue Spruce, Bronze, Charcoal Gray, Dusty Rose, Gray, Limestone, Natural Stone, Precast White, Rustic Brick, Sandstone, White
Durometer - Shore A 15 Shore A
Movement High
Peel Strength 25 ppi
Shelf Life 360 Days
Substrate Porous
Tensile Strength 100 psi
Volatile Organic Content 23 g/liter
Application Benefits
Primerless Adhesion Primerless
Resistance Type Thermal Resistance, UV Resistance, Water Resistance
Water Resistant true
Processing-Formulating Benefits
Cure System 1-Part Cure
Number of Parts One
Room Temperature Cure - Hours 168 to 336 Hours
Tack-Free Time-50% RH 60 Minutes
Where Used Job Site
Working Time 10 to 20 Minutes

Additional information

Weight 2.5 lbs
Dimensions 1 × 1 × 1 in

Adobe Tan, Black, Blue Spruce, Bronze, Charcoal, Dusty Rose, Gray, Limestone, Natural Stone, Precast White, Rustic Brick, Sandstone, White