Airtight zippers protect from chemical fumes, water and other substances. These are specially manufactured and designed to work as a protective barrier against gases and liquids and are usually used in inflatable objects like water-walking balls and water-beds; marine sportswear like wet or dry living suits and survival or life suits; protection suits like decompression clothing, firefighters' suits and immersion suits; camping gear like backpacks, tents; and other functional clothing.
Such zippers are stored separately from normal zippers due to their special characteristic.
How to use
1. Assistance of a person is needed for properly zipping the airtight zippers for clothing like dive suits, as these are placed on the back and can't be accessed by the wearer.
2. PVC airtight zippers can only be used in a temperature ranging between 10oC and 40oC. A temperature beyond these two might weaken the bond between zippers and the cloth and also the structural integrity of the zippers as the extreme temperature may lead to chemical changes in PVC.
3. Move the pull head in the parallel direction along the rack rail. Airtight properties of the zipper may get reduced if the pull is pulled from an angle.
4. It is recommended not to zip up fast. Besides, it is also essential not to repeatedly open or close zippers for long, otherwise the airtight quality will be damaged.
5. Don't pull harshly if zippers are tangled by fabric or thread. Pull the head of the zipper back, then gradually remove the stuck thread or cloth and then zip it back.
6. Clean the outer rail of the zipper with a soft brush or water and then spread a layer of beeswax on the outer rail. However, please note that water or beeswax must not enter the inner rail of the zipper as that can damage the airtight properties.
How to store
1. If airtight zippers are to be stored for a long duration, choose a closed case for protection against humidity and oxidation.
2. It is a must to roll the clothes from the end of the zipper and keep the zipper outside when packaging clothes with airtight zippers. The zipper must not be folded, bent or pressed by any other heavy object.
3. Without outer packing, clothing with airtight zippers should be hung up for storage, then zippers must be kept open to avoid the extension and deformation of zippers.