What is the best way to seal/protect my mosaic glass stepping stones?

Kathleen
by Kathleen
I have already used an outdoor grout sealer, but I am wondering if there is something else to use to strengthen it more.
what is the best way to seal protect my mosaic glass stepping stones, This isn t a great photo but you get the idea It will be placed outside as a divider between grass and gravel
This isn't a great photo, but you get the idea. It will be placed outside as a divider between grass and gravel.
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