Everbuild Lead Mate Sealant Leadmate C3 - Grey

Sika Everbuild Lead Mate Everflex Sealant Adhesive C3 Tube Grey 295ml

Barcode: 5029347007355

Sika Code: 486216

MPN: LEAD

Colour: Grey

The Everbuild Everflex Lead Mate Sealant is a specialist low modulus, neutral cure silicone developed to provide exceptional adhesion to soft metals such as lead, brass, copper, and zinc. Created as a superior alternative to mortaring lead flashing and sheet into brick, stone, or concrete, this sealant provides a durable, flexible, and weatherproof bond that moves naturally with the structure, can be applied using a standard size sealant gun.

Lead Mate offers high temperature resistance up to +150°C, combined with low dirt pick-up and outstanding UV and weather resistance, making it ideal for long-term use on roofs, parapets, and external joints. With its neutral curing technology, it prevents corrosion and staining on metals, ensuring a clean, professional finish every time. Suitable for both trade and DIY use, For best results, always use a polyethylene backer rod in gaps and joints to create true two-sided adhesion—this allows the sealant to flex and move effectively with building materials, maximising its elasticity and service life. Perfect for roofline joints, panels, windows, and door frames

Key Features

• Exceptional adhesion to soft metals such as lead, zinc, brass, and copper.

• Non-corrosive neutral cure formula prevents staining and metal damage.

• Excellent flexibility – accommodates movement up to ±25%.

• Temperature resistant from -50°C to +150°C.

• Weatherproof and UV stable for outdoor performance.

• Low dirt pick-up and solvent-free formulation.

• Low shrinkage for long-lasting, reliable joints.

• Lead grey in colour blends into most roofline applications

• Suitable for most porous and non-porous substrates.

Applications

• Alternative to mortaring lead flashing and sheet into brick, stone, or concrete.

• Ideal for roofing and parapet weather sealing.

• Used for sealing soft metals such as lead, copper, and zinc.

• Suitable for expansion joints and pre-formed panel sealing.

• Perfect for roofline joints, gutters, and leadwork repairs.

• For re-sealing, remove all old sealant and treat with Everbuild 404 Fungicidal Wash before application.

How to Use

• Prepare the Surface: Ensure surfaces are clean, dry, and free of oil, dust, or old sealant. Remove any green mould or moss treat with Everbuild 404 fungicidal wash .

• Cut the Nozzle: Trim the nozzle to the desired bead size and attach it to the cartridge.

• Load and Apply: Place the cartridge into a standard sealant gun and apply a smooth, even bead along the joint.

• Tool the Bead: Smooth immediately using a finishing tool or damp cloth to achieve a professional result.

• Allow to Cure: Leave to cure fully before exposing to extreme weather or heavy rain.

Typical Uses

• Bonding and sealing lead flashing, roof sheets, and parapet joints.

• Expansion joint sealing in lead, zinc, or copper.

• Sealing pre-formed panels and roof edges.

• Weather sealing in construction and roofing applications.

• External joints and gutter seals exposed to temperature change and vibration.

FAQs – Everbuild Lead Mate Sealant

• What makes Lead Mate different from other sealants?
  It’s purpose-made for leadwork, providing superior adhesion, flexibility, and weather resistance without damaging soft metals.

• Can it be used in all weather conditions?
  Yes, it’s fully weatherproof, UV-resistant, and withstands both extreme heat and freezing temperatures.

• Is it suitable for use with non-lead materials?
  Yes, Lead Mate can bond to synthetic lead, aluminium, and other metal roofing products.

• Can it be painted over?
  No, Lead Mate has been designed to flex this is why its base is a neutral silicone sealant.

• How should I store unused cartridges?
  Store upright in a cool, dry place away from heat and direct sunlight. Seal the nozzle tightly to prevent curing inside the tube.

Limitations

• Do not use in conjunction with bitumen, asphalt, neoprene, or certain organic elastomers.

• Avoid substrates that bleed oils, solvents, or plasticisers. Use Everbuild Weather Mate for these applications.

Summary
The Everbuild Everflex Lead Mate Sealant Grey 295ml is the professional choice for bonding and sealing soft metals. Designed as a modern, flexible, and weatherproof alternative to mortaring, it offers outstanding adhesion, durability, and protection from corrosion. Perfect for lead flashing, rooflines, gutters, and external joints, this sealant ensures a watertight, long-lasting finish in all weather conditions.

Everbuild 115 GP Mastic Information:

"Always read the Technical Datasheet prior to first use to ensure you have the correct information and  product for your application"

All Silicones and Sealants