How Long Should Shower Tile Grout Dry Before Sealing It?

Written by michael logan
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How Long Should Shower Tile Grout Dry Before Sealing It?
Shower tile must be grouted and sealed. (ceramic tile image by Karin Lau from

The last step for installing tile is sealing the grout. The grout must be properly cured before the sealer is applied, or the sealer will weaken the grout and the joints will fail prematurely.

Cement Grout

Portland cement-based grouts set in about two hours and cure in 72 hours. Lightly dampen the grout surface with a sponge or spray mister during the first 60 hours and let it dry for the remaining 12 hours before applying sealer.

Premixed Grout

Premixed grout is similar to cement-based grout and has additives that keep it from setting until it is exposed to air. Allow premixed grout to cure 72 hours before applying sealer.

Epoxy Grout

Epoxy grout comes as a two-part mix. Unlike Portland cement-based grouts, epoxy grout does not require a sealer, because it is waterproof. Let epoxy grout cure for seven days before allowing it to get wet or dirty.

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