Patinaetch is a mildly acidic water based solution designed to etch and stain concrete or masonry substrates. The chemical reaction with the substrate results in naturally variegated earth tones similar to the oxidation of a copper roof or the patina of a bronze sculpture.
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Patinaetch is used as a method of adding variegated color to concrete, stucco and masonry surfaces such as interior or exterior floors, walls and even sculptures. These variegations are not defects but are in fact the reason for selecting this method of coloration. These stains are unlike paints or coating and do not cover up, but rather work with the existing surfaces and possibly highlight irregularities.
1. Easy clean-up
2. Chemically fuses with substrate
3. Non film forming
4. Mild acidic base
Patinaetch comes in six custom colors. The colors produced from these standard stain are unique to each concrete surface and could differ significantly from the color chart. Various color effects can be created by:
1. Spray different Patinaetch colors on top of each other.
2. Blend two or more Patinaetch colors prior to staining.
3. Broad casting chemicals such as fertilizer (e.g. ironite).
Complete an on site test sample prior to staining. Color may vary considerably due to temperature, concrete age and surface profile. Always be fully aware of surface contaminates (e.g. curing compounds, sealers, paints, oils, grease, etc.). Do not acid wash before applying Patinaetch, as this will remove the free lime needed for its reaction. Sand the surface prior to staining using a floor polisher/maintainer with 50-100 grit mesh or sand paper. This serves a number of functions, it opens the concrete pores, eliminates a degree of surface tension, removes surface contaminates and weak non-hydrated cementitious particles. Surface must be clean and dry, prior to applying stain. These factors have a considerable influence on determining the success of the Patinaetch application. Apply stain with an all plastic airless pump sprayer (no brass spray nozzles).
We recommend contractors to use a solo 475-diaphragm backpack sprayer with a cone nozzle; Patinaetch is generally applied in 2 coats. You should notice an acidic fizzing reaction. This is a good sign that the surface is accepting the stain. Two methods of applying stains are:
Method 1: Spray two coats from approximately 12" above the surface making sure not to leave puddles or create run marks. The first coat should be touch-dry before spraying the second coat. Use Method 1 when the concrete surface is porous, accepts the stain readily and does not bead on top.
Method 2: Simultaneously spray and scrub the 1st coat with a nylon broom using a circular motion and immediately re-spray with the second coat over the just scrubbed surface. This will flatten out any broom marks. Be careful not to broom excess stain onto un-sprayed areas. Use Method 2 when the concrete surface is impervious and the sprayed patina beads on top.
On very hard concrete it may be necessary to boost the muriatic acid content of the stain (e.g. one part muriatic acid with six parts Patinaetch) this will ensure better color penetration. Most colors can have the acid content boosted except for COLORMAKER'S Patinaetch Azul. During application, the surface should be uniformly saturated with the liquid stain. A wet edge must be maintained. Do not splash, drip, or allow the Patinaetch to puddle in joint areas or other depressions. Do not step on the wet surface. Foot prints will appear after surface has been cleaned and are likely to be darker than the adjacent areas. If stepped on by accident, the footprints should be brushed out immediately. When applying Patinaetch to vertical surfaces, application should start at the bottom and work upward. Excessive run down should be avoided.
NOTE: Azul Patinaetch cannot be boosted with muriatic acid. Azul Patinaetch should not be boosted.
Rinsing and Cleaning
After the final coat of Patinaetch has dried, scrub and rinse the concrete surface with clean water. Scrub with either a medium bristle broom or floor maintainer. Use both a squeegee and wet-vac to remove unwanted residue. Finally rinse off with clean water and wet-vac dry. Do not leave any puddles on the concrete surface as these will cause water stains. Expansion joints should also be left dry.
Surface must be dry before application of Texture Seal or Deco Seal. Use an airless pump sprayer to apply a very thin first coat. Ensure that a continuous membrane is formed. Care must be taken so that the sealer is not allowed to pool. The sealer should be given at least 6 hours to dry between coats especially with the water-based sealer. The installation of sealers will vary, but typically consist of a minimum of two coats of sealer followed by one to two coats of floor finish depending on usage.
(See sealer selection guide or technical data sheets for coverage rates and installation procedures.)
Interior floors must be regularly maintained with Deco Finish or Uro Finish. This is not only for aesthetic reasons but also for protection of the coloration system.
Coverage will depend on both temperature and concrete condition. With Patinaetch work on 150-300 sq. ft. per gallon at full strength for each coat. When used on fully cured concrete, it is quite common to dilute Patinaetch (ratio of 1:1, or a ratio of 1:3, etc.) with a diluting solution, which will lighten the color. This diluting solution should be made from muriatic acid and water (e.g. 10 parts water to 1 part muriatic acid), which would be suitable for a typical concrete surface.
Keep containers tightly closed and upright. Store away from direct sunlight. Under normal conditions, the shelf life is one year.