SIKASIL 670 FIRE RATED JOINT SEALANT

Sikasil®-670 Fire Rated Joint Sealant

Sikasil®-670 Fire is a high-performance, neutral-curing silicone sealant engineered for fire-rated joints. It offers up to 4 hours of fire resistance (according to EN 1366-4) and is suitable for both porous and non-porous substrates. This sealant is ideal for applications requiring a flexible, weather-resistant, and fire-resistant seal.

Features

• Adheres to porous and non-porous substrates including concrete, masonry, metal, and some plastics.
• Tested to EN 1366-4 for up to 4 hours of fire resistance; compliant with EN 15651 and ISO 11600 standards.
• Neutral curing with ±35% movement capability and excellent weather resistance.
• Suitable for interior and exterior use; not for underwater joints, natural stone, or bitumen-based surfaces.
• Restricted to professional and industrial use only (as stated in SDS under "Relevant identified uses")
• Fire Resistance: Up to 4 hours (EN 1366-4)
• Movement Capability: ±35% (ASTM C 719)
• Curing Mechanism: Neutral curing
• Weather Resistance: Excellent
• Application Temperature: +5°C to +40°C
• Substrate Temperature: +5°C to +40°C
• Sag Flow: ~2 mm (20 mm profile, 50°C)
• Skin Time: ~25 minutes (23°C / 50% r.h.)
• Tooling Time: ~20 minutes (23°C / 50% r.h.)
• Shore A Hardness: ~20 (after 28 days)
• Elastic Recovery: ~70%
• Service Temperature Range: -40°C to +150°C
• Density: ~1.35 kg/l

Applications

Ideal for sealing movement and connection joints in building envelopes, including:

• Expansion joints in walls and floors
• Perimeter sealing around doors and windows
• Sealing around pipes and cables
• Fire-rated partitions and ceilings
• Concrete and masonry joints

Suitable for both indoor and outdoor applications, providing a durable and flexible seal that maintains its integrity under fire exposure