Dowsil 781 Silicone Sealant Black 310ml

Dowsil 781 is a one-part silicone sealant designed for a range of sealing applications. It adheres to non-porous surfaces such as glass, aluminum, painted surfaces, and composite boards, and offers resistance to aging, shrinkage, cracking, and discoloration for long-lasting performance. The black sealant is suitable for glazing, weather sealing of sheet cladding and curtain walls, draught proofing, and internal sealing. It conforms to ISO 11600-F&G-20LM and is WRAS approved for contact with potable water once cured. Key performance features include fast curing with tack-free times and short working times, along with reliable joint movement resistance. Application should be performed on clean, dry surfaces within the recommended temperature range, with proper joint preparation to ensure optimal adhesion.

Features

• One-part silicone sealant
• Black color
• Fast cure with short tack-free times
• Joint movement capability ±20%
• Working time 5–10 minutes
• Adheres to glass, aluminium, painted surfaces, and composite boards

Technical specifications

• Color: Black
• Type: One-part silicone sealant
• Application temperature: +5°C to +40°C
• Joint movement: ±20%
• Tack-free time: 1 hour
• Working time: 5–10 minutes