Surely armorall must have some form of plastizer in it, other wise your dashboard would be cracked up,no pint making a product which claims to do a job and then knackers your interior, i use that and rainx ,be it halfords version , also autoglym rubber &vinyl cleaner, but would they bring an old line back to life , doubt it

Dont think wd40 is silacon based

if you want to get a line to speed through yer lines try ptfe dry lube, abit expensive though
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