Silver has been used for years already, but just recently put out by Scent away. I know nothing about the Tek 4, but my warmest baselayer is Cabelas version, I've got light weight X SCENT base layers that are very comfy and my Cabelas Ingenious socks and X Scent use the silver and are awesome.
I've got a full Scent Blocker carbon suit, jacket and pants. The past few years I've worn the carbon siut the most, yet my old non carbon camo jacket and pants was what I was wearing on A LOT MORE successful hunts I was on this year. Go figure. The only problem with the silver clothing is the price, but the price seems to be more from the wicking and warmth qualities than the scent elimination qualities. Cold Gear is about the same price, $50 each, top and bottom. If the Scent AWAY clothing is in that same price range or better, I'd try them. If they are warm and wick moisture good, that to me is the most important thing. If the silver helps, icing on the cake.
American by birth, hunter by choice.