Beyond the Roof
Flexim Roof Mortar
Flexim is a ready-to-use, storm-proof tile adhesive that remains permanently flexible. Introduced to the American market in 1997, it has earned a strong reputation as a reliable solution for securing roof tiles—and a superior alternative to traditional mortar.
Ready To Use Right Out Of The Box
Features
- Box Size: 20" x 18" x 4"
- Strip Size: 20" x 4" x 1"
- Weight Per Box 20 lbs
- Estimated Coverage: 15' to 20' of hip and ridge, both sides
- Shipping: Up to 15 boxes via UPS. More than 15 LTL
- Made in The Netherlands
- Flexim International BV Established 1985
Available Colors - $140 per box
Black
Dark Brown
Gray
Green ($10 Extra)
Light Brown \ Rust
Terra Cotta
Flexim ships directly to you from a pick & pack warehouse, via UPS. Anywhere in the United States or Canada. (Except Florida).
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Some of the Benefits of Flexim Roof Mortar \ Putty
Saves Time and Costs
Tests have shown that Flexim Roof Mortar is up to 5 times faster and 50% cheaper to install than traditional mortar systems. There’s no need for any mixing and no washing out needed when the job’s been completed.
Instantly Waterproof
Once installed, Flexim Roof Mortar is instantly water resistant. It is also extremely strong and will withstand all types of weather conditions and temperature extremes.
Permanently Flexible
Unlike traditional sand and cement mortar, Flexim remains flexible throughout its working life. It will not crack or delaminate, and is unaffected by the contraction / expansion of the roof or wind uplift on the tiles.
Works Great At Almost Any Temperature
Flexim Roof Mortar can be installed from +140°F (+60°C) down to -13°F (-25°C)
Pest Control
Flexim is perfect for keeping rodents, birds, bats and other wildlife out of your roof or building. Flexim can be used to quickly fill gaps in buildings or large holes effectively sealing them up. Because Flexim hardens on the outside while staying soft on the inside this means that if an persistent critters try to get in, Flexim will reseal itself. Meaning repeated repairs would not be necessary. For pest control companies a box of Flexim can be easily stored in the shop or van for quick repairs.
Each box will do 15′ to 20′ of hip or ridge, both sides (30′ to 40′ one side) and contains 10 sticks (20”x4”x1”)
Ready-to-Use
Flexim Roof Mortar is supplied in ready-to-use strips making it quick and simple to install. There’s no time-consuming mixing needed and any product not used can be saved until your next project.
Instantly Waterproof
Once installed, Flexim Roof Mortar is instantly water resistant. It is also extremely strong and will withstand all types of weather conditions and temperature extremes.
Lightweight
Health and safety is of paramount importance on any roofing project. The lightweight Flexim strips are easy to transport onto the roof without any heavy lifting, allowing installation to be carried out quickly and, above all, safely.
Environmentally Friendly
Flexim Roof Putty contains no harmful ingredients and is formulated using natural linseed oil. It is therefore ideal for use during sustainable building construction.
Using Flexim
For roofing applications Flexim is best used on Hips, Ridge and Eaves and should not be used on Valleys.
Warranty
The Manufacturer warrants FLEXIM roof mortar as a sealing and adhesive material. Liability under this warranty is limited to the price of the product as purchased.
The guarantee applies exclusively where FLEXIM roof mortar is applied as a sealing product for ridge or hip tiles (both ceramic and concrete) when applies in accordance with the installation instructions in the leaflet.
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Flexim Roof Mortar FAQ
Can Flexim really replace traditional mortar?
Yes — Flexim is designed as a direct replacement for sand and cement mortar. It’s faster, cleaner, and more durable over time.
How long does Flexim last once installed?
Flexim remains permanently flexible and weather-resistant. Unlike cement mortar, it won’t crack, shrink, or crumble — meaning fewer future repairs.
Is Flexim safe for wildlife and the environment?
Yes — Flexim is solvent-free and non-toxic. It’s safe for use around animals and is commonly used in humane pest exclusion work.
Can I install Flexim in cold or hot weather?
Absolutely. Flexim can be installed in temperatures from -13°F (-25°C) to +140°F (+60°C), making it perfect for year-round use.
How much coverage does one box provide?
Each box includes 10 sticks (20”x4”x1”) and will cover approximately 15–20 feet of hip or ridge (both sides), or 30–40 feet on one side.