What type of varnish should i use for an acrylic painting that won't affect the look of the painting?

i quickly looked at the varinishes at this store, and al of them added some sort shine to them. what is a good brand that will have as little affect on the painting.What type of varnish should i use for an acrylic painting that won't affect the look of the painting?
I also like the satin-finish varnishes, rather than matte or gloss. I know that your question states that you don't want to ADD a shine or gloss, but using a matte-finish product (unless you absolutely want a flat finish) tends to suck the life and vibrancy out of acrylic painting.





The satin-finish doesn't really add any ';gloss';, but rather just enhances what's already there ... just a bit of richness and glow.





You can use the artist-quality varnishes (Liquitex, for ex.) from an arts-supplier, or you could also use a craft-grade varnish (Delta Ceramcoat) from a craft-store, or even furniture-grade (Minwax Polycrylic) from a home-improvement or hardware store. The artist-quality product is most specific to acrylic art, but all will work and all are available in several finishes.What type of varnish should i use for an acrylic painting that won't affect the look of the painting?
it really depends on the sheen that you desire for your finished painting to have. the two big acrylic companies Liquitex and Golden both make their own line of varnishes. both are of good quality and dry crystal clear without yellowing. they have three sheens gloss, satting and matte. if you want no shine at all then you want a matte finish. it will just be a crystal clear coating with no shine at all. be sure not to over brush it too or it will turn cloudy.
Try Golden MSA varnish in Satin - either spray or brush-on - it's not too shiny, not too matte. My favourite and I would never switch.