Dowsil 890-SL Silicone Joint Sealant

Dowsil™ 890-SL is a high-performance, self-leveling silicone sealant engineered for concrete and concrete-to-asphalt pavement joints. Its unique formula flows into irregular joints without the need for tooling, providing a durable and flexible seal that withstands extreme weather conditions and heavy traffic. With its fast skin-over time and unprimed adhesion, Dowsil™ 890-SL streamlines the sealing process and minimises downtime.

Key Features

• Self-leveling: Eliminates the need for tooling, saving time and labour.
• Wide Temperature Application Range: Can be extruded from -20°F to 120°F (-29°C to 49°C).
• Excellent Movement Capability: Accommodates 100% extension and 50% compression.
• Ultra-Low Modulus: Minimises stress on joint faces for long-lasting performance.
• Weather and UV Resistant: Withstands harsh environmental conditions.
• Fuel Resistant: Tolerates short-term exposure to fuels (see Dow form 62-207).
• Cold Applied: Ready to use with no heating or special preparation required.
• Unprimed Adhesion: No primer needed for Portland cement concrete and asphalt, saving time and materials.
• Fast Skin-Over: Allows for quick reopening of roadways to traffic.

Uses

• Concrete to concrete and concrete to asphalt pavement joints
• New construction, repair, and remedial applications
• Sealing irregularly shaped and spalled joints

Benefits

• Saves time and labour with self-leveling formula
• Provides a durable, long-lasting seal
• Accommodates joint movement for optimal performance
• Resists weathering, UV exposure, and short-term fuel exposure
• Streamlines the sealing process with unprimed adhesion
• Minimises traffic disruption with fast skin-over time

Additional Information

Limitations

• Not recommended for continuous water immersion or totally confined spaces.
• Do not apply to wet or damp surfaces or during inclement weather.
• Consult Dow before using in airfield runway applications.
• Not intended for spill containment areas or medical/pharmaceutical uses.

Additional Product Downloads:

• Download TDS
• Download SDS