Most concrete sealers can be sprayed on with either a garden-style pump sprayer or an HPLV sprayer. They can also be applied with a lint-free paint-and-stain roller.

This can happen for a number of reasons. Pump-up sprayers work well when you've got a lot of pressure, but when you start losing pressure you get differentials in the thickness of sealer.

Use a pump sprayer or a paint roller to apply the patio stain color evenly over the concrete surface. If you're using a sprayer, pay extra attention to determine how much it needs to be diluted ...

The Coval Polished Concrete Sealer (PCS) by Coval Technologies won’t change the natural beauty of polished concrete while protecting the surface from stains, acids, and oils.