Silicone Sealant – Lead Mate – Metal Applications

Product Overview

The High-Performance Lead Mate Silicone Sealant in Grey, available in a 295ml cartridge, is a low modulus, neutral cure silicone sealant designed for soft metals like lead, brass, copper, and zinc. This sealant is an excellent alternative to traditional mortaring of lead flashing and sheets into brick, stone, or concrete. It provides robust adhesion without the risk of staining or corrosion. With its superior weather resistance, it maintains flexibility and durability across a wide temperature range.

Features & Benefits

• Low modulus neutral cure formulation: Ensures durable adhesion to soft metals without corrosion or staining.
• Excellent adhesion to metals: Bonds effectively to lead, copper, brass, and zinc for lasting, watertight joints.
• Exceptional flexibility: ±25% movement capability accommodates expansion and contraction.
• High temperature resistance: Reliable performance from -50°C to +150°C.
• Low shrinkage: Less than 5% volume loss during vulcanization.
• Excellent weather resistance: Suitable for continuous external exposure with long-term UV and moisture stability.
• Non-staining formulation: Preserves appearance around joints without marking cement or stone surfaces.
• Paint compatibility: Resistant to plasticizer migration, suitable beneath water-based and solvent-based paints.
• Easy application: Smooth consistency for clean, controlled application with a standard sealant gun.
• Cartridge size 295ml: Provides approximately 10.5 linear meters of a 6mm diameter bead per unit.

Applications

• Lead flashing installation: Effective for securing lead flashing and sheets into brick, stone, or concrete.
• Expansion joint sealing: Ideal for joints subject to structural movement and temperature fluctuation.
• Soft metal sealing: Bonds securely to lead, copper, zinc, and brass without corrosion.
• Weatherproofing: Ensures watertight sealing for parapets, roof joints, and external cladding interfaces.
• Panel joints: Suitable for weather sealing and joint sealing in pre-formed façade panels.

FAQ

• What materials is this sealant compatible with?
  This sealant is compatible with lead, copper, brass, and zinc.
• Can this sealant be painted over?
  Yes, it is resistant to plasticizer migration and can be painted over with both water-based and solvent-based paints.
• Is this sealant suitable for outdoor use?
  Yes, it offers excellent weather resistance and is suitable for continuous external exposure.