Retrotec DucTester 350x Operation Manual page 53

2. Position clamp on the 100mm duct 300mm or so down, so it's out of the way.
3. Position 100mm duct on connector with about half (50mm) of connector still exposed.
4. Unroll Self Fusing Silicone Tape a little at a time being very careful to not let it touch itself.
5. Hold one end in place as you use your other hands to stretch and wrap tape around the flex duct
and connector.
6. When you get back to the starting point over lap the tape about half way and
7. Continue stretching and wrapping to cover about 25mm on the end of the duct and about the
same onto the connector creating an airtight seal. 2 layers will be ample.
8. Tighten clamp over the tape to ensure the duct doesn't slide off the connector.
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©Retrotec Inc. 2015