Airducts
To ensure an optimal and economic air circulation in a galvanised air duct it is necessary to have a durable sealing of the joints. After all a small percentage of lost air could imply strong decrease of pressure in the ventilation system seriously affecting its efficiency.
The tapes often have to seal the joint between the tube (flexible part) and duct (fixed part) and also have to compensate possible irregularities of a tube-clip.
The tapes should also be resistant to a high and constant static or dynamic air pressure. They have to be suitable to endure big fluctuations of temperature and they should also have a long service life. All in all a rather complicated application for which only products specially designed can be used.