The Lead Flexislate offers a premium, weather-tight solution for sealing flue pipes and soil stacks on both flat and pitched roofs. Designed for durability and flexibility, it ensures long-term protection against wind uplift, chatter, and water ingress. Whether you’re working on a traditional tiled roof or a modern flat installation, this product provides a reliable, professional-grade seal.
With its strong rubber-to-metal bond and high-grade lead base, Flexislate is built to withstand the elements and deliver dependable performance for over 20 years when installed correctly. It's ideal for a wide range of domestic and commercial applications.
Key Features
Versatile Application: Compatible with all standard pipe diameters and roofing types.
Wide Pipe Compatibility: Accommodates pipe diameters from 25mm to 125mm.
Temperature Resilient: Suitable for flue pipes operating at temperatures up to 100°C.
Superior Weatherproofing: Works effectively on slate, tile, asphalt, felt, and lead roofs.
Durable Lead Base: Made from BS EN 12588 Code 4 rolled lead for longevity and strength.
Robust Rubber Bond: The neoprene conical upstand is vulcanised at high temperatures and pressure for strong adhesion and long life.
Profile Options
The Lead Flexislate is available in two profile designs to suit different roof angles:
Flat Profile – For shallow roof pitches between 0° and 30°
Pitched Profile – For steeper roofs with a pitch between 20° and 40°
This flexibility ensures the product can be tailored to your specific project, maintaining a tight seal no matter the pitch.
Installation Advice
For a successful and secure installation, always choose the Flexislate profile that matches your roof pitch. If you're sealing around a boiler flue, make sure the pipe's outer surface does not exceed 100°C. The rubber sleeve is marked with concentric grooves—cut to the appropriate size for a snug fit, and use liquid soap to ease it over the pipe.
Once the sleeve is in place, apply Prepat or Patination Oil to all visible lead areas to prevent staining and corrosion. On pitched roofs, welt the top edge of the tile for a clean and secure finish.
Health & Safety Guidance
When working with lead, always follow safe handling practices:
Keep the product away from children
Comply with the Control of Lead at Work Regulations 2002
Wash hands thoroughly before eating, drinking, or smoking
Use Premium Metwash Soap and Bodywash to remove any lead residue
Lift with care, as lead is dense and heavy
Frequently Asked Questions
1. What types of pipes can the Lead Flexislate seal?
The Flexislate is designed to fit a wide range of pipes, from 25mm up to 125mm in diameter. It’s perfect for soil stacks, boiler flues, and other vertical penetrations through both pitched and flat roofs.
2. Can I use Lead Flexislate on a hot flue pipe?
Yes, the Flexislate is suitable for flue pipes with surface temperatures up to 100°C. If you're working with a boiler flue, ensure the pipe doesn’t exceed this temperature on the outer wall.
3. What’s the difference between the flat and pitched profiles?
The flat profile is suitable for shallow roofs with a pitch from 0° to 30°, while the pitched profile is designed for steeper roofs between 20° and 40°. Choosing the correct profile ensures a proper fit and reliable weatherproofing.
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