Concrete Primer

Zinsser Block Filler 2X is a thick water-base primer specifically formulated for concrete surfaces. It is two times thicker than typical primers providing superior fill for an even and more uniform topcoat. The product has superior resistance against concrete salts (efflorescence), as well as high alkalinity from newly cured concrete, both of which can be damaging to topcoat finishes. It’s perfect for the professional painter and DIYers .