We notice that grout turns darker in our new shower when wet. It will turn back to natural color after it drys. Should we put a sealer on the grout

We checked with our Tec Grout Rep and this grout does not need to be sealed. If it is staying dark by the drain there maybe a drainage issue but if it just gets dark where it is wet then dries no problem. If you want to it, any solvent based sealer would work. Here is a list of sealers that we carry that have been tested with Tec Power Grout: Miracle 511 Impregnator Miracle H2O Plus Miracle Porous Plus Miracle Super Seal