There are two basic types of basement sealers: densifiers and waterproofers. Densifiers penetrate concrete and cause a chemical reaction that fills the tiny air capillaries and microscopic cracks ...

Sealers should be applied so thinly that ... one coat of an acrylic concrete sealer should be about 5 mils thick when wet. When dry, one coat of sealer is only about 2 mils thick.

The good news is, they can last between 5-10 years ... and water-repellent that makes concrete driveways much more resilient.

For example, in a stain resistance test where you pour pickle juice or vinegar or something acidic on the surface to see how long it takes for it to mar the concrete, some sealers are going to ...