Concrete Etching Machines

The World’s Best Precast Concrete Etching Systems

There is no better finish for concrete than acid etching. Acid etching sparkles compared to the dull aggregate of sand-blasting and say goodbye to silica dust, wormholes, efflorescence, and other issues. And there is no better way to acid etch than with a Kem-O-Kleen.

That’s why there are Kem-O-Kleen systems in place at 70%+ of the nation’s largest architectural precastors and FRC locations. Multiple unit installations, strong repeat purchases, and our specialized experience are further testimony to the product’s effectiveness.

  • Cut etching time to less than half that of traditional methods – quick pay-back on investment.
  • Thorough, consistent etching – very effective on detail where acid can pool or miss coverage using traditional methods
  • Use less chemical to do the job – designed for muriatic acid
  • Better finish – aggregate not dulled as with sandblasting
  • Precise control of chemical quantity applied
  • Rugged durable construction – designed for the job site
  • 200’ of full jacket hose – covers plenty of areas
  • A variety of models to fit all applications and budgets

High volume operators prefer the power of the MK7 and SK8 to keep production moving. Ornamental, FRC and smaller panel plants often select the smaller output of the MK3 and SK4 for their great etch. We are proud to have played a role in the many awards our customers have earned over the years.


Enhancing concrete finish with a concrete etching machine

In precast concrete finishes, acid etching is commonly applied to structures that have light to medium exposure. Acid etching removes the surface of the concrete and exposes the fine and coarse aggregate underneath by using a dilute hydrochloric acid solution. 

In addition to removing years of sediment, acid etching also gives a structure a brand new look by eliminating years of deposit. Concrete with acid-etched surfaces weathers better than concrete with form lines.

Concrete etching produces a fine, sandy surface similar to limestone or sandstone, with the cement paste and sand being the dominant elements visible on the surface.

Unlike unfinished building materials, acid etches concrete has a unique yet natural appearance for building exteriors that meet today’s trends. The quality of the mold used to produce precast is essential to ensuring that this surface will have a limited number of voids.

A precast plant may achieve an etched finish by soaking the element in a solution of acid and then scrubbing it to remove the outer skin about a week after removing it from the mold.

Precast concrete elements that are etched, prevent chloride from infiltrating the reinforcement due to the advanced manufacturing techniques. Acid etching w/KOH can be performed very quickly after the elements are removed from the mold. Consistency is important., try to etch all panels around the same time, post-mold removal.


Formerly model K-3003. The flagship of our Masonry Cleaning machines optimizes pressure (agitation), heat and the ability to use muriatic acid (or other chemicals) in the high pressure stream, resulting in fast thorough cleaning.


  • New Masonry Cleaning
  • Masonry Restoration
  • Cleaning Forms, Mixers, other Equipment
  • Etching Concrete
  • Cleaning Fiberglass Structures
  • …all other traditional pressure washer applications and more


  • Acid Induction - Controlled Introduction of Chemical into High Pressure Water Stream - Patented, No Other Machine Does This!!
  • Trailer or skid mount
  • Choice of gasoline, or electric power


  • Hot water - 100 degree pick-up over ambient
  • 3000 psi, 3.9 gallon per minute flow, lower psi hot water models available
  • 18 Hp, 2 cylinder, electric start gasoline engine
  • 20 gallon chemical tank
  • 7 gallon recirculation tank - keeps pump cool, no need to shut down when off the trigger
  • 8 gallon gasoline tank
  • 200’ full wrap, 2-wire, 5000 psi, chemical resistant hose
  • 12v burner - no need for 110v connection
  • Over-the-road trailer (credit for deletion available)

Call 800-274-4121 or click here for more information.



The World's Best Masonry Cleaning and Restoration Systems - Designed by a Mason for use by Masons and Professional Masonry Cleaners.

In the early 1970s, Charlie Hewett, a mason by trade, knew there had to be a better way to clean new masonry and restore existing masonry. He designed and patented the Kem-O-Kleen ®. Since then, the product has been continuously improved and refined, including a number of new features unique enough to be patented. Strong repeat purchases from existing customers, and our long history, are evidence of the product’s value.

  • Cut cleaning time to less than half of traditional methods - quick pay-back on investment
  • Thorough, consistent cleaning - chemical is precisely controlled
  • Use less chemical to do the job - designed for muriatic acid, and other masonry cleaning chemicals
  • Precise control of chemical quantity applied
  • Rugged heavy duty durable construction - designed for the job site
  • 200’ of hose - covers plenty of area
  • A variety of models to fit all applications and budgets

Kem-O-Kleen Masonry Cleaning Systems come in a variety of performance levels to fit a variety of budgets. Our most popular model is the MK3 hot water unit, while some of our masons prefer the C-3004 cold water machine.