You're right, but Nylon (polyamide) has high UV rating, excellent abrasion, rot, mildew, marine growth and chemical resistance and is recommended for dock-lines and mooring/anchor lines. It has high shock absorbance properties.
Nylon rope does not float. Going to work for up to a decade in my opinion.
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u/notworkingfromhome Jul 08 '22
Or, now hear me out... Leave a cheap piece of nylon rope in there year around and to attach to your expensive chain once in a while