I poured a concrete garage floor 7 days ago. My contractor told me to
seal it the next day, but neglected to tell me to get a product
designed for fresh concrete. I used Armor All Waterproofing Sealer 24
hours after the concrete was poured. The product says it contains
Petroleum Distillates. It's been 6 days now and (not surprisingly)
it's still wet.
I know I screwed up... but how badly? Did I damage the concrete? I'm
assuming I need to remove the sealer. What chemicals do I use? How
much will I need to remove the product from a 725 sq ft floor? Will
it be safe to wash the chemicals down my drain (which eventually
drains into a grassy field)?
Thanks for any advice!
firstname.lastname@example.org (Steve Miles) wrote in
Try contacting the manufacturer of the sealer and ask them for
recommendations. If there's any benefit to removing it (or just cleaning
the wet part off the surface), they should be able to tell you what the
best product would be for that purpose.
Leave it alone. It will take longer to cure but the water will react
with the concrete and you'll get a good cure. It will just take longer.
Coatings of this sort are sometimes applied to concrete after pouring
in very hot situations to slow the drying and improve the cure.
Take two aspirin and call us in a month if it's not ok then.
Steve Miles wrote:
I thought I'd post a follow-up for the group. I called Armor All and
spoke to a knowledgable individual. He said the floor would
eventually cure, but it might take another week, or it might take 6
months. I followed his suggestion of using paint thinner to remove
the sealer. There was too much sealer to actually mop it up, so I
basically scrubbed the floor with a cotton mop and shop broom, then
washed the floor with a hose. It took about 4 gallons of paint
thinner for a 725 sq ft. He said I could use mineral spirits, but the
paint thinner was cheaper if the area was well-ventilated. A week
later the floor dried with only a little remaining sealer in spots. I
then sealed with "Cure And Seal" and the floor is fine.
email@example.com (Steve Miles) wrote in message
I didn't read your original post, so anything I say here is moot but maybe
someone else in the group can obtain some benefit from my remarks.
You made a couple of mistakes.
The first was not hiring a contractor who would finish the job. It is the
concrete contractor who should spray on the curing compound or cure and
seal, not the customer. It should be applied immediately after the final
finish trawling. The idea is to keep the water in the concrete. It _should_
look wet, for 30 days if possible. keeping the concrete wet with water is
also a good curing procedure. Putting a sheet of visqueen on the slab also
The second mistake was using ArmourAll. It probably cost a bunch, much more
than curing compound or Cure and seal.
The third mistake was taking it off and leaving the slab uncovered for a
week. This allowed the water to evaporate out of the surface and dry the
slab too quickly.Concrete needs about 30 days to cure to its max strength.
It needs water in the slab to do this. Letting it dry before it is cured
will weaken the slab. I'm not trying to alarm you or cause you to think the
slab is junk. You may never realize the difference. The worst problem may be
excessive dust from the surface of the slab, or it may crack sooner than a
properly cured slab, but it should do so at the control joints. You did
specify control joints didn't you?
Any way I'm happy for you and your new garage. Is it for a vehicle or are
you going to fill it with tools?
Tom, 30 years in construction.
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