look at this link
what gel is used here or similar products
http://images.google.com/imgres?imgurl=www.forzamilan.com/pics/nesta.jpg&imgrefurl=http://www.forzamilan.com/aug2002.htm&h=210&w=310&prev=/images%3Fq%3Dnesta%26svnum%3D10%26hl%3Den%26lr%3D%26ie%3DUTF-8%26oe%3DUTF-8%26sa%3DG
To me it just looks like it actually is wet, and not the result of gel. I suppose you could achieve that look with gel, if you use enough of it, and apply it to the hair while it's wet.
Sebastian Wet shows a wet look like this.
looks more like hair wax to me ..
so can these gels keep hair straighted and wet at the same time.
p.s this guy's hair is always wet (plays soccer 90 mins) so i think it's impossible for hair to stay wet for that peroid or even 45 mins in italy in summer...!!!