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Question DetailsAsked on 6/4/2015

Driveway replacement with colored stamped concrete. Contractor will seal 2 days after pouring. Is that too late?

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Not sure if you mean the curing compound, or actually sealing.


Depends on the brand of sealer being used, but to me that is WAYYY too EARLY. The concrete should be wet cured for a bare minimum of 7 days and preferably longer to gain strength and wear resistance - maintained wet by spraying frequently, or more commonly covering with plastic sheeting or a wet covering like burlap and rewetting daily (or more often as needed) to keep the surface at least damp. A concrete that is properly cured for 28 days will have about twice the cracking, freezing, and surface wear resistance of one cured for 7 days, and about 4-8 times the resistance of one cured one day as many contractors do (if even that long) or just having a curing compound applied a few hours after placement but no wet curing. The latter is what most contractors do, which explains in many cases the many complaints here about cracking and spalling within days or weeks after placement.


Commonly this is done (if done properly) by wet curing for 7 days, then spraying with a curing compound (which seals in the water to continue curing) and keeping the edges and surface of the concrete damp daily, then after a month or so from the pour date, it is finally allowed to dry and then is sealed.


I would have no faith in the so-called curing compound/sealers, and a curing compound is not suitable as a long-term sealer. Be sure the sealer is compatible (preferably same brand line) with the curing compound, because some are latex or rubber based, some waxes, some oil based, some silicone based - so mixing brands can result in the sealer not adhering and doing its job.

Answered 4 years ago by LCD




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