DOWSIL 789 WEATHERPROOFING SEALANT

About DOWSIL 789 WEATHERPROOFING SEALANT

DOWSIL 789 Weatherproofing Sealant

DOWSIL 789 Weatherproofing Sealant is a one-part, neutral-curing silicone sealant specifically designed for weatherproofing and sealing applications in building faades, curtain walls, windows, doors, and exterior cladding systems. It provides excellent adhesion to a wide range of construction materials without the need for a primer in many applications, ensuring long-lasting protection against air and water infiltration.

The sealant offers outstanding resistance to UV radiation, ozone, moisture, and extreme weather conditions, making it ideal for both new construction and renovation projects.

Features

One-part, ready-to-use silicone sealant
Neutral cure system with low odor
Excellent weathering, UV, and ozone resistance
Superior adhesion to glass, aluminum, masonry, and painted surfaces
High flexibility and movement capability
Long service life in exterior applications
Resistant to temperature extremes and environmental aging

Applications

Curtain wall perimeter sealing
Window and door perimeter joints
Expansion and movement joints
Exterior faade weatherproofing
Glass and aluminum assemblies
Building envelope sealing

Technical Properties

Type: Neutral Cure Silicone Sealant
Appearance: Smooth Paste
Color: Available in various colors (Black, White, Grey, etc.)
Movement Capability: 50%
Tack-Free Time: Approximately 30 minutes
Service Temperature Range: -50C to +150C
Cure System: Moisture Cure

Benefits

Excellent long-term weatherproofing performance
Prevents air and water leakage
Maintains flexibility over a wide temperature range
Durable UV-resistant seal for exterior applications
Reduces maintenance requirements