Accredited specialists in lead flashing sealant application and repair
Experience you can rely on
With over 50 years of experience in specialist repair and finishing works, SD Team has built a reputation for high-quality workmanship and dependable delivery. Our teams operate nationwide and are trusted by contractors, managing agents and building owners to complete critical envelope works safely and efficiently.
We deliver specialist lead flashing sealant applications, ensuring durable weatherproofing
Chimneys and roof penetrations
Our experienced technicians apply lead flashing sealant around chimneys, flues and roof penetrations to prevent water ingress at high-risk junctions. Works are completed with careful preparation and detailing to ensure long-term performance in exposed conditions.
Roof to wall abutments
We provide precise sealant application at roof and wall junctions where lead flashing interfaces with masonry, render or cladding. This ensures a continuous, watertight seal while allowing for natural movement between materials.
Stepped and apron flashing
SD Team applies and repairs sealant to stepped and apron flashing, restoring weather resistance where existing seals have failed or deteriorated. This service is suitable for both new installations and remedial works.
Lead sheet laps and joints
Our teams seal laps and joints within lead sheet installations, ensuring protection against moisture ingress while maintaining flexibility to accommodate thermal expansion and contraction.
Gutters, valleys and roof details
We apply lead flashing sealant to complex roof details including valleys, gutters and interface points where lead meets other roofing components. This helps maintain water tightness and reduce the risk of ongoing leaks.
Repair and maintenance sealing
As part of planned maintenance or reactive repair works, we remove failed sealant and reapply new lead-compatible sealant to extend the service life of existing flashing without unnecessary replacement.
High-level and occupied building works
Lead flashing sealant application is often required at height and on live buildings. SD Team delivers these works safely using appropriate access methods, supported by clear risk assessments and method statements to minimise disruption.
Lead flashing sealant FAQs
Our lead flashing sealant FAQs answer common questions from building owners, managing agents and contractors. They explain when sealing is appropriate, how work is carried out and what to expect.
When is lead flashing sealant repair suitable instead of replacing the flashing?
Sealant repair is suitable where the lead flashing itself remains in good condition, but existing seals have failed due to age, weathering or movement. In these cases, removing degraded sealant and applying new lead-compatible sealant can restore watertightness without the need for full flashing replacement.
What type of sealant does SD Team use on lead flashing?
SD Team specifies neutral cure, metal-compatible sealants that are safe for use with lead and other soft metals. Product selection is based on exposure, movement and substrate conditions to ensure long-term performance in external environments.
How long does lead flashing sealant last?
When correctly specified and professionally applied, lead flashing sealant can provide long-lasting protection against water ingress. Lifespan depends on exposure, movement and maintenance, but proper application significantly extends the service life of existing flashing.
Is lead flashing sealant compliant with building regulations?
Lead flashing sealant repairs are assessed on a project-by-project basis to ensure they do not compromise building envelope integrity or fire performance. SD Team delivers works in line with good roofing practice and wider building safety requirements.
Can failed sealant be repaired without damaging the lead?
Yes. Our technicians carefully remove failed or degraded sealant without damaging the lead sheet. New sealant is then applied to restore performance while preserving the integrity and appearance of the flashing.
Get in touch
If you need lead flashing sealant applied as part of a repair, maintenance programme or wider building envelope works, SD Team is ready to help. Contact our team to discuss your site, confirm the right approach and arrange professional, safe application that delivers long-term weatherproofing.