Flexim Roof Mortar is a lightweight, ready-to-use roofing solution made from natural ingredients, with vegetable linseed oil as its main component. Designed with ease of use in mind, Flexim comes conveniently packaged in 5 or 10 strips, making it ideal for quick fixes and detailed roofing work. Whether you're a professional roofer or a DIY enthusiast, Flexim offers a no-fuss way to tackle a wide range of roof-related tasks.
Versatile for Roof Repairs, Renovations & New Builds
Flexim is incredibly versatile, making it suitable for roof repairs, renovations, and even new construction projects. It's especially effective for securing tiles during frosty conditions—particularly along ridge and corner rafters—but its uses don’t stop there.
You can also use Flexim to:
Secure and support tiles in valley gutters to keep them wind- and watertight
Fill gaps between ridge caps and chimneys, sealing cracks and preventing drafts
Reinforce tiles around roof windows, offering both wind and waterproofing
Seal around lead flashings to stop them from sagging over time
Fill joints between corrugated sheets to prevent unwanted air leakage
And of course—fix roof leaks quickly and reliably
Flexible, Weatherproof & Easy to Apply
Thanks to its unique, high-quality formula, Flexim roof mortar is highly flexible and can adapt to the shape and movement of your roof. It’s built to withstand all weather conditions, maintaining its performance whether it’s hot, cold, wet, or windy.
Best of all, no special tools are required—you can apply it by hand, making it an ideal choice for DIYers looking to repair their roof themselves. For deeper cracks in cement layers, you can also pair Flexim strips with Flexim Re-Fix paste for even more thorough sealing.
Key Features
Made from natural linseed oil
Ready-to-use strips – available in packs of 5 or 10
Wind- and waterproof sealing for tiles, chimneys, lead flashings & more
Flexible and adapts to roof movement
Works in all weather conditions
No tools required – easy hand application
Ideal for both professional use and DIY
Also compatible with Flexim Re-Fix paste for added sealing power
Frequently Asked Questions
1. What makes Flexim different from traditional roof mortar?
Flexim is made from **natural ingredients**, comes **ready to use in strips**, and doesn’t require mixing or tools. It’s **flexible**, so it adapts to roof movement, and it can be applied **by hand**, making it great for professionals and DIYers alike.
2. Can I use Flexim in cold or wet weather?
Yes! Flexim is designed to be **weather-resistant** and performs well in **cold, wet, or windy conditions**. It’s especially effective at holding tiles in place during frost or temperature fluctuations.
3. Where on the roof can I use Flexim?
Flexim can be used in **valley gutters**, around **roof windows**, at **chimney bases**, along **ridge tiles**, and to **seal cracks** around **lead flashings** or **corrugated sheets**. It’s a truly **multi-purpose roof sealing solution**.
Check out our full range of roofing supplies.
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