SikaSeal® Lead

Specialist low-modulus, neutral-cure sealant from Sika, specifically formulated for exceptional adhesion to soft metals such as lead, copper, zinc and brass. Designed as a modern alternative to traditional mortar when bedding lead flashing and sheet into brick, stone or concrete.

SikaSeal Lead offers excellent flexibility, low dirt pick-up and outstanding external weathering performance. It will not corrode or stain soft metals and provides a durable, weatherproof seal for a wide range of roofing and construction applications.

Key Benefits

• Exceptional adhesion to soft metals – Ideal for lead, copper, zinc and brass without causing corrosion.
• Alternative to mortar – Perfect for bedding lead flashing and sheet into brick, stone and concrete.
• High flexibility – ±25% movement capability for long-lasting performance.
• Excellent temperature resistance – Performs from low temperatures up to +150°C.
• Low dirt pick-up – Maintains a cleaner appearance over time.
• Low shrinkage – Less than 5% during curing.
• Weather resistant – Outstanding external durability and UV resistance.
• Compatible with paints – Can be used over water-based and solvent-based coatings.

Typical Applications

• Bedding lead flashing into masonry
• Sealing soft metals (lead, copper, zinc)
• Parapet and roof weather sealing
• Expansion joints and panel sealing

Ideal for roofers, leadworkers and general builders needing a reliable, non-corrosive sealant for lead and other soft metal detailing. A professional, long-lasting solution for both new work and repairs.

Always ensure surfaces are clean, dry and sound before application. Apply using a standard sealant gun in accordance with the manufacturer’s instructions. Follow Health & Safety guidance during use.