A modern formulation, DRYLOK® Etch is highly effective in etching masonry, stone, tile, and brick. It removes unsightly efflorescence (salt deposits) as well as excess mortar.

Use DRYLOK® Etch, as a safer alternative to muriatic acid, to treat smooth concrete and condition galvanized surfaces prior to painting.

DRYLOK® Etch Application

Quick Overview

DRYLOK® Etch is easier to use than those stronger acids typically employed to cut into unprotected parts of metal surfaces, smooth and highly troweled concrete, brick, and ceramic tile. Plus, there are no harmful fumes!

Product Features:

  • Clean and etch concrete, stone, tile, galvanized metal, and brick
  • Interior/exterior
  • A powder form that mixes with water
  • Size: 12 ounces
  • Coverage: 12 ounces will etch 300 square feet



  • Concrete
  • Walkways
  • Patios
  • Garage floors
  • Basements
  • Driveways
  • Carports
  • Concrete tennis courts
  • Brick
  • Stucco
  • Concrete walls
  • Galvanized metal
  • Ceramic tile

How To / Videos

Stop Water in 3 Easy Steps - Just Prep, Patch, and Paint!
How to remove Efflorescence (natural salt deposits) from Masonry Surfaces

See more Home Improvement Videos


Proof of Performance: ASTM Testing

  1. ASTM D 16 – Standard Terminology for Paint, Related Coatings, Materials and Applications.


Wear eye protection with side shields, chemical-resistant gloves, protective footwear and suitable clothing when using DRYLOK® Etch. Remove dirt, dust, grease and oil by washing with a detergent solution*. Allow the surface to dry before applying DRYLOK® Etch.


To remove efflorescence, clean mortar or etch galvanized surfaces – dissolve 12 ounces of DRYLOK® Etch in 1 gallon of water. For etching concrete prior to painting – use 12 ounces of DRYLOK® Etch to .5 gallons of warm water. Do not use a galvanized container. Wear rubber gloves and eye protection.

Treat smooth concrete with DRYLOK® Etch. A properly etched surface should look and feel slightly rough, like fine sandpaper. If surface remains smooth, repeat the etching procedure until the surface has the proper texture. Thoroughly rinse the surface with clean water. Allow the etching solution to remain on the surface for at least 20 minutes. While etching, the concrete surface should bubble. If some areas do not bubble, this indicates deep oil or grease stains that will require additional cleaning. Scrub these areas again with a heavy duty detergent and repeat the etching procedure. Allow the surface to dry at least 24 hours before staining or painting.

USAGE STATEMENT: Prior to use, carefully read the product label and follow the directions. For technical information, warnings, cautions, notices, and additional information, download and read the documentation available on this website.

* WARNING: If you scrape, sand or remove old paint, you may release lead dust. LEAD IS TOXIC. EXPOSURE TO LEAD DUST CAN CAUSE SERIOUS ILLNESS, SUCH AS BRAIN DAMAGE, ESPECIALLY IN CHILDREN. PREGNANT WOMEN SHOULD ALSO AVOID EXPOSURE. Wear a NIOSH-approved respirator to control lead exposure. Clean up carefully with a HEPA vacuum and a wet mop. Before you start, find out how to protect yourself and your family by contacting the National Lead Information Hotline at 1-800-424-LEAD or visit www.epa.gov/lead.