Easy to install gas and watertight seal for cables in micro ducts. The duct seal is easy to install on new and existing installations. Thanks to the clever design you no longer need to slide a seal all the way along the fibre cable to seal it against gas and water. Due to the compact design, the seals can be installed in all situations, even in locations with difficult access. Easy-to-use product, providing quick and efficient sealing of the end of the micro duct and thereby long-term protection of the installation from water, moisture and dirt entering the duct.