New slab looks like ****. Need help/ advice.

[naturalgas]

My slab was poured, burnished, sawed and sealed in one day, twelve hours. When sealing I think he put down more on the back and less on front. I don't think he wanted to open the second 5 gallon pail. The next day I had some blotches and within four days I had many more. Can this be corrected with more sealer? I am pissed over this . I'm not calling the concrete guy back he was a sleazebag. I hope I can correct without a big expense. Pics will show what I am dealing with

Slab is three weeks old
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[Garage Flooring]

What did you seal it with and how long did the manufacturer suggest waiting to apply sealer -- for concrete to cure?

 

[B964]

Same thing happened with my slab. After about a year most all the dark was gone.
Looks like concrete guy used some kind of curing sealer.

 

[Colonial Cobra]

I've never heard of sealing the same day. Or even within days of the pour. Usually weeks or months later. Do you have the sealer information?

 

[Armorpoxy]

This may be correctable with a new sealer, but as we always say, test, test, test first.

 

[Handyfarmer]

my guess is, it is not a "sealer" in the way that most think of sealer, most likely it is a curing compound, that traps the moisture in the slab so that the concrete will cure to it ultimate strength, (concrete does not DRY it cures, and transforms the moisture via chemical change to a part of the concrete,

since most people will not water the slab ever 2 hrs., for 7+ days, the compound is a good way to go,

 

[naturalgas]

I don't know the product he used. I told him I wanted it sealed and this is what I got. I just hope I can go over it with another product and get it it looking good.


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[Rudyjr]

my guess is, it is not a "sealer" in the way that most think of sealer, most likely it is a curing compound, that traps the moisture in the slab so that the concrete will cure to it ultimate strength, (concrete does not DRY it cures, and transforms the moisture via chemical change to a part of the concrete,

since most people will not water the slab ever 2 hrs., for 7+ days, the compound is a good way to go,

Exactly right, there are many "cure and seal" products on the market made by many manufacturers. Some are solvent base and some are waterborne and all of the concrete guys in my area use them. This is the type of material it looks like to me:http://euclidchemical.com/products/...based-curing-sealing/super-diamond-clear-350/

 

[COSMOS]

How long after the slab was finished was the picture taken.?

 

[Bluedodge]

Why is there a LP heater on a freshly poured floor?

 

[naturalgas]

How long after the slab was finished was the picture taken.?

Slab was poured 3 weeks ago. Pics taken today


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[SunsetsAndFriends]

Call the concrete installer and ask what he used. Tell him the issues you are seeing and ask him if he can fix it.

 

[rubberrodder]

You stated the contractor did not evenly apply the product. More at the rear and less at the front areas. Where are the blotches? Front or rear? It may be the curing sealer needs to have a minimum thickness to work properly. But since it has been over 3 weeks since it was applied, you will most likely have to sand out the blotches and re-coat to get rid of them. Just applying more sealer with out removing the defective stuff, will just give you nice, shiney blotches.

 

[jeepermat]

My contractor that poured my shop floor several years ago in Wi recommended that I seal as soon as possible when he was done pouring, I forget the name of the product, but it did say to seal once the concrete had setup enough to walk on it.

I had spots that looked very similar to that, over the course of 6 months it went away.
I would wait a bit longer to see what happens before trying to correct.

 

[c39er]

My slab was sealed the day of the pour and looks nice and has held up well for the past 20 years.

 

[LegacyIndustrial]

The blotches are water vapor trapped under the sealer.
He probably put too much of the product down and now it is trapping moisture.

It may release over time or it may delaminate. Tough to say.

It can be stripped off and re-sealed.

 

[Rudyjr]

If it is a cure and seal product it will let the moisture in the slab out over time, that is what curing compounds do is slow down the water evaporation to help the concrete cure more slowly. The one I supplied the link to can be applied as soon as the bleed water is gone from the surface of the pour.

 

[naturalgas]

Thanks guys. I will wait awhile and see what happens. Too cold now anyhow. Mid 30's inside.


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