Everbuild Lead Mate is a single-component sealant designed to seal lead flashing and sheet into brick, stone and concrete. A practical alternative to mortar that stays flexible, resists cracking, and creates a fully waterproof joint.
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£0.10£0.12
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£2.49£2.99
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£0.20£0.24
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£2.39£2.87
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£0.30£0.36
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Everbuild Lead Mate is a high-performance lead flashing sealant formulated specifically to replace mortar when bedding and pointing lead sheet into brickwork, stonework and concrete. Where traditional mortar eventually cracks, shrinks and lets water in, Lead Mate forms a flexible rubber seal that moves with the structure and stays watertight. One tube, no mixing, no waiting for a plasterer to sort the pointing out.
The sealant bonds to lead, bitumen, and galvanised steel, as well as most common masonry substrates. That combination makes it genuinely useful across a range of roofing and flashing jobs rather than being limited to a single application. Whether you are sealing step flashings into a brick course, bedding apron flashings at chimney bases, or pointing valley lead into stone, Lead Mate handles the job without the mess and brittleness you get from a sand and cement mix.
Where Everbuild Lead Mate Lead Flashing Sealant Gets Used
Lead Mate is designed for use by roofers and builders working on both new installations and repair work. The sealant works on wet or dry surfaces, which is useful when the weather is not playing along and you need to get a watertight joint down before the next shower arrives. It does not crack or shrink as it cures, and once set it remains permanently flexible, so seasonal thermal movement in the lead does not break the seal over time.
Lead sheet expands and contracts noticeably with temperature changes, and that is exactly where mortar joints tend to fail after a couple of winters. A rigid pointing material simply cannot keep up. Lead Mate accommodates that movement, which is the core reason it exists as a product.
Finish and Overcoating
Once cured, the seal can be painted after 24 hours. That matters on jobs where the finished appearance needs to match surrounding masonry or where the client wants the flashing points tidied up cosmetically. The paintable surface also means Lead Mate works on visible elevations without leaving an obvious bead of sealant on show indefinitely.
As a single-component product, Lead Mate is ready to use straight from the tube with a standard skeleton gun. There is no mixing, no measuring, and no waste from a partially used two-part system going off before the job is done. For roofers who carry a gun in their kit bag as standard, it slots straight into the existing workflow.
The product is available in individual tubes and in bulk box quantities, making it practical for one-off repairs or regular site use. If you are going through volume, it is worth contacting us about bulk buy pricing, as there are savings available at higher quantities.
Everbuild Lead Mate is a straightforward, reliable solution for pointing and sealing lead flashing without the long-term problems that come with mortar. If lead joints are cracking and leaking on older properties, this is the kind of repair that holds properly the second time around.
Pro Tip: Apply Lead Mate into a raked-out chase or chase groove before pressing the lead in, rather than tooling it over the top afterwards, as this gives a far better bond and a neater joint that does not rely on surface adhesion alone.
Everbuild Lead Mate is used by roofers and builders to seal lead flashing and sheet lead into brick, stone and concrete substrates. Typical jobs include pointing step flashings into brick courses on chimney stacks, sealing apron flashings at roof abutments, and bedding valley lead on older properties. The sealant is also suitable for use on bitumen and galvanised steel, making it useful for a wider range of roofing repair and maintenance work beyond lead flashing alone.
Best For
Pointing lead flashing into brickwork
Sealing lead sheet into stone and concrete
Chimney stack flashing repairs
Roof abutment and apron flashing sealing
Replacement for mortar pointing on lead
Compatible Surfaces
Lead sheet and lead flashing
Brick and mortar
Stone
Concrete
Bitumen
Galvanised steel
Key Properties
Single component, no mixing required
Wet or dry surface application
Permanently flexible rubber seal
Will not crack or shrink
Fully waterproof once cured
Paintable after 24 hours
Not suitable for: Lead Mate is not intended as a general-purpose sealant for joints unrelated to lead, bitumen or galvanised steel roofing applications. It is not a structural adhesive and should not be used as a substitute for mechanical fixings.
Everbuild Lead Mate is applied using a standard skeleton cartridge gun. The substrate should be clean, free from loose material, and ideally raked out to provide a channel for the sealant to key into. The product can be applied to both wet and dry surfaces, so rain does not have to stop work, though a dry surface will always give the best initial bond.
Tool the sealant into the joint or chase firmly to ensure full contact with both the lead and the masonry substrate. Smooth off with a wet finger or tool to achieve a neat finish. Leave to cure fully before exposing to heavy rain. The surface can be painted after 24 hours if required.
Rake out or clean the joint to remove loose mortar, debris and any old sealant
Ensure the lead surface and masonry substrate are clean and free from dust or grease
Load the cartridge into a standard skeleton gun and cut the nozzle to the required bead size
Apply Lead Mate into the chase or joint, working the sealant in firmly to ensure full contact
Press the lead flashing into position if seating into a fresh chase
Tool the joint with a wet finger or spatula to achieve a clean, neat finish
Leave to cure before exposing to heavy water flow
Paint over the cured sealant after 24 hours if a finished appearance is required
Can Lead Mate be applied in wet conditions or on damp surfaces?
Yes. Everbuild Lead Mate is formulated for use on both wet and dry surfaces, so it can be applied in damp conditions without the bond failing. This makes it practical for roofing repairs where you cannot always wait for perfect weather.
Is Lead Mate a permanent replacement for mortar pointing on lead flashing?
Yes. Lead Mate is designed as a long-term alternative to mortar. Unlike cement-based pointing, it remains permanently flexible once cured, which means it moves with the thermal expansion and contraction of lead sheet rather than cracking over time.
Can Lead Mate be painted over once it has cured?
Yes. Everbuild Lead Mate can be painted after 24 hours. This is useful where the finished joint needs to blend with surrounding masonry or where the client wants a tidy cosmetic result on a visible elevation.
Everbuild Lead Mate is a single-component, high-performance sealant that cures to form a flexible rubber seal. It is compatible with lead, bitumen and galvanised steel substrates, and bonds to most common masonry materials including brick, stone and concrete. The formulation is designed to resist cracking and shrinkage over time, maintaining a fully waterproof joint even under the thermal movement typical of lead sheet installations.
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