Top Coating Canvas

I've reached that point of getting color and texture I'm very happy with. Now I'd like to seal it further. Without adding color.
Will drop by SW again and have a chat about a clear water based sealant. Figured I'd ask you folks as well.
What do you use as a top coat sealer or maintenance sealer that's clear.
I'll also ask how important it is to have a sheen? I'd really like to go flat. I have a semi right now and don't like it shining in the sun..
Will drop by SW again and have a chat about a clear water based sealant. Figured I'd ask you folks as well.
What do you use as a top coat sealer or maintenance sealer that's clear.

I'll also ask how important it is to have a sheen? I'd really like to go flat. I have a semi right now and don't like it shining in the sun..