How can I determine if my surface had a sealer applied in the past?

What is the difference between Concrete Sealer Clear Gloss and H&C Wet Look Sealer?

What clear coats can go over Infusion Acid Stain?

What is the best method of application for the Infusion Industrial Floor Finish?

With all the Sealers available in the H&C line, which is the best for application over the solid color water-based stain that is a low luster or satin finish?

What is the maximum allowable moisture content of the concrete before I can apply the H&C Sealer?

Seal coat is very cloudy, how do I fix this?

I have a freshly poured concrete driveway and patio, how long do I need to wait until I can seal it?

What is the difference in look between a water-based and solvent-based sealer?