This is because the solvent in the fresh sealer temporarily breaks down the existing sealer lets the moisture out and melts the old sealer back onto the surface.
Resealing concrete floors.
To seal concrete floors use an epoxy sealer if you want something durable that comes in a variety of colors.
For indoor concrete floors that won t be exposed to oil or grease use an acrylic sealer which is easy to apply.
Not only does this get rid of any lurking dust and dirt it cleans away any of the old sealant that may be cracking or flaking.
According to concrete trade organizations such as concrete network you should plan on resealing every one to three years.
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Concrete floors are easy to take care of.
Although resealing atop hazy sealer might make colored concrete look better initially the problem will soon return and worsen.
Dogs won t leave scratch marks on concrete floors as they would on wood.
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Before applying check the weather.
If you want to seal over concrete floors that already have a seal try a polyurethane sealer.
Sealer needs to be applied in dry conditions because it won t adhere to damp concrete.
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Over time concrete floors can settle unevenly or become uneven due to cracking and moisture.
Applying fresh sealant over old is seldom a good idea.
Despite your best efforts even your durable concrete floors can start to show signs of wear and tear.
All it takes is a mop and water to clear away the dust and debris.
Fortunately it s easy to refinish your floors in a number of concrete stain colors.
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Depending on the type of surface treatment you used you may need to restain repaint or reseal your floors.
If your concrete is new you ll need to let it cure wait at least one month before applying sealer.
Any concrete flooring being prepped for resealing must be thoroughly cleaned preferably with a good detergent and a complete rinsing.
Whether you want to refinish an uneven basement floor or replace or add new flooring on top of an existing concrete floor somewhere in your home you most likely will need to level the concrete floor.