Which Glue should I use for an engineered Stone (http://g603.net) seam?

Hi Mark

Next week I have a installation to do, it's a white caesarStone (http://g603.net) , and (http://maplered.com) have a seam, I'm scary to use my regular polyester Tenax, because I don't think thats is possible match the white color, because when the poly is dry always looks darker. so what do you recomend to glue that seam, I have the crystal glue too, but it take so long to dry, What do you think?

Regards....