Why is the zip is curved/humpy after pressing?

Spiral/coil zips have an S twist and Z twist in the teeth creating a “smile” or “frown” appearance when the teeth are joined. The left and right teeth should be both in the same direction/condition. If this is not the problem check the sewing tension is equal on both sides of the zip. Also check […]

Why are sewn coil zips sometimes called nylon zips?

Previously these zips may have been made from a range of manmade materials like nylon, polyester, polypropylene, poly butyl phthalate (PBT). Nylon was a common material used for zips due to its smoother feel and so this remained as a name for this category of zips.

Are Opti zips chlorine and salt water resistant?

Please inform our Customer Service department when placing orders for boat covers / marine upholstery. For boat covers / marine upholstery, we recommend standard puller with silver plated slider, or special plastic sliders.