CONCRETAL® W Mineral Sol Silicate Finish for Concrete


High-Performance and Opaque Mineral Silicate Finish
Unsurpassed Design Flexibility


Unparalleled Adhesion:
The mineral sol silicate binder penetrates into concrete and forms permanent, covalent bonds within the concrete by a process called “petrification”. This mineral finish is completely compatible with concrete and will never blister or peel from the surface. Acrylic, latex and elastomeric finishes form a “sticky” mechanical adhesion only on the surface of concrete.

Vapor Permeable:
Despite its natural water repellency, the mineral surface is highly vapor permeable and will allow inherent moisture vapor in concrete to escape freely without blistering or bubbling from the surface. Concretal® W is ideal for use on both new and old or repaired concrete where a fully opaque and protective finish is desired. Acrylic, latex and elastomeric finishes are far less permeable and tend to hold moisture vapor inside concrete.

Despite the fully opaque nature of Concretal W, finished concrete never looks “painted”. Concretal W has a mineral matte, very natural finish that even darkens when wet, just like unfinished concrete. Mineral finishes refract light in all directions and appear brighter in low-lighting making them ideal in below-grade concrete applications like parking garages, transportation stations, tunnels and more. And, Concretal W will never glare even in direct sunlight. Light refractions also helps lower and regulate surface temperatures on concrete.

Sheds Water:
Mineral micro pores of Concretal W, naturally sheds water the same way a stone sheds water. And, with millions of hydrophobic micro-pores, mineral painted concrete surfaces dry out much faster than concrete painted with latex, acrylic or elastomeric paints. Fast drying, coupled with the inherent high pH of mineral finishes inhibits growth of mold, mildew and algae—the surface will appear cleaner and fresher, longer.

Won’t Attract Dirt:
Concretal W is a completely inert, mineral finish and never develops a static charge in the presence of wind and weather. Latex, acrylic and elastomeric finishes are thermoplastics and develop static charges when wind blows across the surface. This static charge can attract dirt and pollution particles and hold them on the surface. The Concretal W surface naturally washes clean with every rainfall as dirt particles are not attracted to the mineral surface.





Will Never Peel or Blister Penetrates and forms permanent covalent bonds within concrete for unparalleled adhesion
Long Life Mineral sol silicate finish lasts for decades
Will Not Fade Uses only naturally occurring mineral pigments that are completely lightfast and naturally U.V. resistant
Hinders Mold, Mildew and Fungus Mineral surface dries out quickly and high pH resists bio-growth
Concrete Consolidation Sol silicate binder penetrates and petrifies improving strength and reducing “sanding” of aged concrete
Protects Against Freeze/Thaw Damage Keeps water out and allows moisture vapor to freely escape—dryer concrete is less prone to freeze/thaw damage
Protects Steel Reinforcement By keeping concrete dryer and protecting against chloride salts, steel reinforcement lasts longer
Natural Concrete Appearance Mineral matte finish is most like original concrete—never looks “painted”
Simple to Repaint Minimal surface preparation required for future repainting
Stays Clean Longer Natural mineral surface sheds water and doesn’t build static charge, which can attract and hold dirt on the surface



LEED 09 NC Not applicable for exterior
LEED for Homes Not applicable for exterior
LEED 09 CS Not applicable for exterior
LEED 09 CL Not applicable for exterior
Environmental Product Declaration per ISO 14025 and EN 15804 Third-Party Certified



Concrete (standard and high performance) Precast Concrete
Autoclaved Cellular Concrete Tilt-up Concrete
Concrete Masonry Units (CMU) Concrete Fiber Board (siding)
Glass Fiber Reinforced Concrete CMU masonry construction
Portland Stucco Brick and Masonry
Lime Plaster/Stucco Historic Mineral/Masonry Surfaces

*Surfaces must absorb water and should not be previously painted.


Sol-silicate-based, thin layer coating for providing a low pigment finish when diluted with KEIM Concretal-Fixativ or for opaque thin layer protective coatings. Complies with DIN EN 1504-2/2.2 when using it together with KEIM Silan-100.


Concrete Coating and Staining, Concrete Repair, Painting/Coating Interior


For a two-coat opaque finish: approx. 0.25 l/m2 KEIM Concretal-Lasur and approx. 0.04 l KEIM Concretal-Fixativ
For a two-coat low-pigment finish: Depending on degree of dilution, determine by trial application
The stated consumption figures are guide values for a smooth substrate. Exact values can only be determined by painting trial areas on the structure to be coated.

Packaging & Sizes

Red bucket w/white lid - 1 liter, 5 liter and 15 liter containers
Stain: Plastic bucket with plastic lid - Quart, 1 Gallon, 2 Gallon, 4 Gallon
Dilution: Plastic Jerrican - 1.3 Gallon, 5.3 Gallon


For providing a low-pigment finish on fair-faced interior and exterior concrete surfaces, e.g. to retain the fair-faced appearance while concealing stains or repairs with a concrete color shade and for providing colour wash finishes when diluted as required with KEIM Concretal-Fixativ.
For opaque thin layer coatings retaining surface texture and providing a protective water and weather coating

Reference Projects

Noguchi Playscape Atlanta
Noguchi Playscape Atlanta (Atlanta, GA)
Florida Southern College
Florida Southern College (Lakeland, FL)
Aeropuerto- Airport
Aeropuerto- Airport (Madrid, OVD)
Housing area in Zurich
Housing area in Zurich (Zurich, ZU)
National Zoo- Elephant House
National Zoo- Elephant House (Washington, DC)
Elephant House
Lloyd Street Synagogue
Lloyd Street Synagogue (Baltimore, MD)
Stillwell Ave Trainstation
Stillwell Ave Trainstation (New York, NY)
Reagan National Airport
Reagan National Airport (Washington, DC)
Pier 53 Fire House
Pier 53 Fire House (New York, NY)
Concrete construction, new project construction, contemporary design housing administrative offices and equipment spaces
The Morrison House
The Morrison House (Savannah, GA)
Homeowners were unhappy with color and overall appearance of the stucco.
Oceangate -2955 West 29th Street
Oceangate -2955 West 29th Street (Brooklyn, NY)
Concrete structure, 14 stories, with concrete balconies
Oceangate - 2730 West 33rd Street
Oceangate - 2730 West 33rd Street (New York, NY)
Concrete structure, 14 stories, with concrete balconies
Oceangate - 2850 W 24th Street
Oceangate - 2850 W 24th Street (New York, NY)
Concrete structure, 14 stories, with concrete balconies
Hearst Magazine Building
Hearst Magazine Building (New York, NY)
The Hearst Magazine Building is a landmark structure
Fort Hill Tower
Fort Hill Tower (Roxbury, MA)
Historic Fort Hill Water Tower renovations.
Louisa May Alcott Orchard House
Louisa May Alcott Orchard House (Concord, MA)
Preservation of the barn to include a new poured concrete foundation
Smithsonian National Zoo GSB Retaining Wall
Smithsonian National Zoo GSB Retaining Wall (Washington, DC)
New construction- large retaining wall with mural to match a stone affect
10 Sullivan, New York, NY
10 Sullivan, New York, NY (New York, NY)
Clarks America, 1265 Main St
Clarks America, 1265 Main St (Waltham, MA)
Adaptive reuse of abandoned former Polaroid campus building. Approximately 120,000 square foot 1950's era cast in place concrete structure will home to U.S. headquarters of Clarks Shoes.
Mission National Bank
Mission National Bank (San Francisco, CA)
Precast concrete cladding and decorative element repairs and silicate coating system.
Grand Central Air Terminal
Grand Central Air Terminal (Glendale, CA)
Renovation of a 1922 Spanish Colonial Revival and Art Deco styled commercial airport of stucco, concrete, and precast concrete.
Kirche St. Hedwig
Kirche St. Hedwig (Karlsruhe, DE)
Cast concrete construction required decoration, color and protection.  
Battery Parking Garage
Battery Parking Garage (New York, NY)
Battery Parking Garage, built in 1950 of cast concrete, was in need of exterior restoration. The aged concrete surface was seriously degraded with extensive corrosion of exposed steel structural rebar.  The MTA needed a cost-effective and long-term solution that would provide a weather and water repellent finish, while helping to mask the unsightly cracking and help minimize the appearance of extensive patching and beautify the exterior facade.   
Rollins Building / Old Astrazeneca HQ
Rollins Building / Old Astrazeneca HQ (Wilmington, DE)
Office structure was formerly headquarters for a major developer and was acquired by Astrazeneca
MTA Smith and 9th Street
MTA Smith and 9th Street (Brooklyn, NY)
MTA project. The station is located in Brooklyn, NY and is listed as the highest elevated subway station in NY
George Washington Elementary
George Washington Elementary (Chicago, IL)
Georgia Street Bridge, San Diego
Georgia Street Bridge, San Diego (San Diego, CA)
This historic structure has been an iconic gateway to San Diego’s North Park neighborhood for 100 years. Deterioration, weakened concrete and severe seismic weaknesses threatened the future of this handsome spandrel arch bridge. This project provided an innovative design that balanced safety, historic preservation, cost, and seismic performance to revitalize an aging arch bridge located in a vibrant community of San Diego.  After retrofitting, the raw concrete appearance was marred by the many patches and repairs required.  A more uniform appearance and a color consistent with the historic precedent was desired.  Concretal W High Performance Sol-silicate Paint was chosen to provide a more uniform but natural appearance.  
SCAD 40 Residency Hall
SCAD 40 Residency Hall (Atlanta, GA)
New student housing at the Savannah College of Art and Design, Atlanta campus rises in midtown Atlanta at the intersection of Interstates 75 and 85.  The stunning black exterior is custom precast concrete and the deep color was chosen to match all other structures on the campus.  Keim mineral paints were chosen for their natural "concrete" appearance and for their nonfading qualities.  Typically, deep shades like this black would fade quickly in the Georgia sun, but with Keim, the owner received a 20 year color guarantee against color change.  
Hunters Point Library
Hunters Point Library (Long Island City, NY)
Hunters Point Library sits along the East River waterfront in Long Island City, wedged between two notable landmarks—the famous Pepsi-Cola sign and the Long Island sign in Gantry Plaza State Park. Designed by Steven Holl Architects, this newest branch of the Queens Library system has an extremely futuristic look and feel; a concrete building with cutouts along its shiny aluminum sides makes it more like a work of art than your run-of-the-mill library. Surrounding the library is park space overlooking the water, and inside readers will find children’s, teen and adult sections, along with a ground-level reading garden and a rooftop one with panoramic views of the City.
Ashford Perimeter
Ashford Perimeter (Atlanta, GA)
A six story Class A office space located at the intersection of Ashford Dunwoody and I-285 in Atlanta was built in 1982 and required renovation in 2020.  It encompasses 300,000 square feet.  
Archeologie Centre
Archeologie Centre (Sélestat, SA)

A new facility dedicated to archaeology, housing a conservation and study centers as well as the services of the public institution Archéologie Alsace. Its designer, the architect Raphaël Voinchet, founder of the W-Architectures agency, designed a building adorned with black finely exploiting all the natural qualities of concrete. Its mechanical and inertial performance has made it possible to guarantee optimal conservation and exploitation of the collections.

Markley Data Center
Markley Data Center (Lowell, MA)
Encompassing a massive 352,000 square feet, this concrete building's exterior was refurbished and protected with Concretal Black Purity, the blackest paint specifically for concrete.  The aged concrete structure received the pure black finish to visually move it into the 21st century, but also to protect the weathered concrete from further degradation from the elements.  

A stunning museum addition with exhibition space, galleries, seven garden courtyards, 215-seat theater, two pedestrian tunnels, parking arrival hall, conference rooms, restaurant overlooking sculpture garden, café, and a triple-story Forum.  The design by Steven Holl Architects is characterized by porosity, opening the ground floor at all elevations. Seven gardens slice the perimeter, marking points of entry and punctuating the elevations. The largest garden court, at the corner of Bissonnet and Main Street, marks a central entry point on the new campus. When standing in the great new entrance lobby of the Kinder Building, one can see gardens in four directions and feel the inviting energy of a new sense of openness to the community.