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DRYLOK® Powder Concrete and Masonry Etch & Cleaner prepares interior/​exterior masonry and concrete for waterproofing and painting. 

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Product Overview

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 and is not activated until mixed with water for safe storage. It is perfect for treating smooth concrete and condition galvanized surfaces prior to painting.

Clean up: Water

Coverage: 300 square feet per 12 ounce container when used as a cleaner. 150 square feet per 12 ounce container when used as an etch.

  • Ideal for removing efflorescence and excess mortar build-up on tile, galvanized metal, stone, concrete and brick
  • Application with a stiff brush
  • Fast and effective, and safer than muriatic acid
  • CSI Masterformat® 03 01 00 Maintenance of Concrete
Click to expand / collapse
  • Concrete
  • Walkways
  • Patios
  • Garage floors
  • Basements
  • Driveways
  • Carports
  • Concrete tennis courts
  • Brick
  • Stucco
  • Concrete walls
  • Galvanized metal
  • Ceramic tile
How to Apply DRYLOK Etch
How to Apply DRYLOK® Etch

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.


Surface Preparation: Using a steel brush, scrub and remove as much dirt, efflorescence, and dust as possible. Mixing: Dissolve 12 oz. of DRYLOK® Etch in 1 gallon of warm water using a plastic container. Wear rubber gloves and eye protection. Application: Pre-wet the surface. If working in large areas, work in 4’x4’ areas at a time. Thoroughly wash and rinse each section before moving on. Improper rinsing will allow DRYLOK® Etch to recrystallize on the surface and look like efflorescence. Multiple water rinses may be required. Note: If treating surface for efflorescence, only treat areas where efflorescence is present.

Surface Preparation: Sweep away all loose dirt and debris. Clean and remove oil spots and spills, wash the floor with a suitable detergent or degreasing solution, and rinse thoroughly. Mixing: Dissolve 12 oz. of DRYLOK® Etch in 12 gallon of warm water using a plastic container. Wear rubber gloves and eye protection. Application: Allow new concrete to cure for a minimum of 28 days. Etch with a stiff bristle brush and make sure the areas stay wet during the process. For floors, pay close attention to areas where vehicle tires usually sit. Continue scrubbing while rinsing to ensure all contaminants are washed away. It is best to work in small sections, completing one section at a time. Properly etched surface will feel like medium grit sandpaper, improving adhesion of coatings. When all surfaces are dry, be sure no evidence of DRYLOK® Etch solution remains. Allow surfaces to dry completely before coating.


Q. Which products help remove efflorescence and prevent it from reoccurring?

A. United Gilsonite Laboratories manufactures a product called DRYLOK® Etch. While DRYLOK® Etch will remove efflorescence and help prevent it from reoccurring, understand that efflorescence comes from salt deposits found in the block itself and can reoccur at any time.

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.