I have got 6 sail bags with zips.

3 are broken. All due to salt seizing them I think. All less than 2 years old.

I bet if I counted all the other zips on my gear 50% would be bust.

How do you keep zips working and free of salt and sand ?, other than washing them everytime you go out, which kind of defeats the purpose of having a bag in which to throw a salty, sandy sail.

I use chain lube on them every so often but it only seems to delay the inevitable