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highlanderross

Grout curing time for 1/16" unsanded grout

highlanderross
10 years ago

Hi,
I am redoing our kitchen floor with wood plank porcelain tile that is rectified. The space between the tile is 1/16" and we are using unsanded colored grout from bostik. The instructions state that it must be damp cured for 3 days if we do not use a latex admixture from bostik.

My contractor states that even if we do not use the admixture, he doesn't think we need to cure it for 3 days and he has never cured it at all?

Any thoughts? I want to ensure the grout doesn't crack and the floor is strong.

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