Lead Sealant: Why Proper Application Matters
Lead Sealants for Roofing & Flashing
Working with lead flashing requires a dependable, weatherproof sealant that can handle the demands of outdoor exposure. Whether you’re sealing joints on chimneys, around abutments, or along roof valleys, the right lead sealant ensures long-lasting, watertight protection.
We stock a trusted range of lead flashing sealants from top brands such as Everbuild and Soudal – all available with trade discounts, bulk order options, and fast UK-wide delivery.
What Is a Lead Flashing Sealant?
Lead flashing sealants are specially formulated to bond with metal, brickwork, stone, and concrete, providing a strong, flexible seal that accommodates movement and prevents water ingress. These products are typically used in:
- Roof junctions between lead and brickwork
- Chimney stacks and roof tiles
- Wall abutments and parapets
- Sheet lead applications in valleys or dormers
Unlike standard silicone, lead sealants offer enhanced adhesion to metal surfaces and are often colour-matched in grey to resemble traditional mortar or lead itself.
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Why Use a Lead Sealant?
Using a specialist lead sealant ensures your installation is not only secure but also compliant with best roofing practices. It also avoids the cracking or separation that can happen with generic sealants under outdoor weather conditions.
Key Benefits:
- UV and weather resistant – ideal for exterior applications
- Flexible – accommodates movement in lead caused by temperature changes
- Strong adhesion – sticks to lead, brick, concrete, and slate
- Quick to apply – ready to tool and cures quickly for fast turnaround
- Neat finish – typically available in grey for seamless integration
Recommended Lead Flashing Sealants
We’ve hand-picked three reliable options to suit a range of applications and budgets:
- Everbuild Lead Mate Sealant
A tried-and-tested favourite among roofers, this neutral cure, flexible sealant is designed specifically for use with lead. It creates a durable, weatherproof bond and is the go-to alternative to traditional mortar pointing. - Soudal Lead Sheet Sealant – 290ml
This high-performance hybrid polymer is ideal for bonding lead to porous and non-porous surfaces. It’s UV-stable, weather-resistant, and offers excellent movement accommodation. - Soudal Metal Fix Sealant – 290ml
Perfect for sealing or bonding metal sheet materials including lead, zinc, and aluminium. Ideal for high-stress areas where flexibility and high grab strength are required.
How to Use Lead Sealant Effectively
Proper application is key to long-lasting results. Here are a few tips to help ensure a professional finish:
- Clean the surface – ensure lead and adjoining surfaces are dry and free of dust or grease.
- Cut the nozzle to match the joint size and apply using a standard sealant gun.
- Tool the joint using a sealant applicator or pointing tool for a neat finish.
- Allow the sealant to cure fully before exposing to heavy rain or temperature swings.
For best results, always follow the manufacturer’s application instructions and check compatibility with surrounding materials.
Why Buy from Us?
We work closely with roofing and building contractors across the UK, supplying high-performance sealants backed by:
- Trade discounts and bulk pricing
- Fast and reliable UK-wide delivery
- Leading brands like Everbuild and Soudal
- Knowledgeable customer support ready to help
Whether you’re managing a single repair or sourcing for large-scale roofing works, we make it simple to get the right sealant at the right price.
Need to Match a Specific Colour or Finish?
If your flashing needs to blend in perfectly, check out our Colour Match Silicone guide to explore custom RAL colour options for a seamless finish.
For a visual guide on applying lead pointing sealant, you may find the following video helpful:
