On Tue, 11 Sep 2018 10:20:48 -0700 (PDT), Andy
wrote:

I have been using a silicone spray on my chain, but it isn't long before it rusts.

Anything better?

What about about Squirt Long Lasting Dry Chain Lube ?

Thanks.

A high viscosity oil of some sort, one that will stay on the chain.
This will, of course, collect dirt and crud whereupon you will need to
clean the chain.