Slate tile-should I seal before grouting?

Question

I plan to seal after grouting. There are prices for sealer ranging from 25.00 to 125.00 Is there a difference?
Thank you.

Answer 1

Yes. You should seal the tile both before grouting, to prevent the grout from staining the tile, and again two weeks after grouting to prevent the grout from staining

Answer 2

I've been retired too long. New products in sealers.
That much descrepancy, you sure it's not size?
Check with supplier.
Seal the tile after grouting. It will seal the grout also.and Prevent
moisture stains in the grout. CLEAR I hope.