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CONCRETE DENSIFIER AND CHEMICAL
HARDENER
DESCRIPTION
LIQUI-HARD concrete densifier and chemical hardener
compound is a ready-to-use, colorless liquid, formulated
with chemically reactive raw materials to harden and
dustproof concrete. When properly applied, LIQUI-HARD
will offer substantial improvement in abrasion
and chemical resistance and will significantly improve
the durability of the concrete surface when compared to
untreated concrete. As LIQUI-HARD is applied and
penetrates into the concrete surface, a chemical reaction
takes place, producing a byproduct that fills in the pores
of the concrete. This process produces a substantially
denser concrete surface with enhanced durability. In
addition to the densifying and hardening action, LIQUI-HARD
also solidifies the concrete, eliminating dusting
and pitting.
LIQUI-HARD meets maximum VOC content limits of
400 g/L for Concrete Protective Coatings as required by
the U.S. EPA Architectural Coatings Rule. Concrete
properly treated with LIQUI-HARD is USDA-accepted.
USES
LIQUI-HARD is recommended for use wherever
hardened, dustproofed and improved chemical and
abrasion resistant surfaces are required. Ideal
applications include floors in industrial plants and
warehouses, storage silos, sewage plants, chemical
processing facilities, refineries and heavy pedestrian
floor traffic areas, such as civic centers, sports arenas,
stadiums, hospitals, airports and museums. LIQUI-HARD
can successfully be used in conjunction with
shake-on hardeners.
The INDUROSHINE™ system combines green certified concrete polishing and diamond grinding equipment with LIQUI-HARD to create a unique, high sheen, wear-resistant concrete floor. Please contact MEADOWS for more information.
FEATURES/BENEFITS
COVERAGE/APPLICATION RATE
| Type of Surface | ft.²/gal. | m²/L |
| *Fresh (Newly Placed) | 300 | 7.36 |
| Existing (Old) | 200 | 4.91 |
| *When used as a
curing compound on newly placed concrete. Note: Coverage rates may vary, depending on the finish and porosity of the concrete. |
||
PACKAGING
5 Gallon (18.93 Liter) Pails
55 Gallon (208.20 Liter) Drums
APPLICATION
Surface Preparation...Fresh Concrete: On newly placed
concrete, LIQUI-HARD can be applied, as you would a cure,
after final troweling. Existing (Old) Concrete: Surface should
be clean and structurally sound. Remove all residues, curing
compounds, oils, sealers, contaminants and laitance before
applying LIQUI-HARD. ULTRITE® DEGREASER
from W. R. MEADOWS may be used for cleaning. (Refer
to data sheet #353.) Fill and repair all holes, cracks and
deteriorated areas that have been removed to sound concrete.
For optimum results on fresh, newly placed concrete, use MED-CURE™ curing aid (data sheet #367) from W. R. MEADOWS immediately after final finishing operations have been completed. Apply LIQUI-HARD according to the “EXISTING” concrete directions a minimum of three days after placement of concrete.
Mixing...For optimum performance, gentle mixing or agitation is recommended.
Application Method...Fresh Concrete: Apply undiluted LIQUI-HARD at approximately 300 ft.²/gal. (4.91 m²/L) using a low-pressure sprayer or by spreading evenly with a soft-bristled broom. Do not allow material to puddle on the surface. No further application steps are required for fresh concrete.
Existing (Old) Concrete: Saturate the surface with undiluted LIQUI-HARD by sprayer, squeegee or broom. Keep the surface wet with LIQUI-HARD for a minimum of 30 minutes. (A range of 30-60 minutes may be required depending on temperature and conditions.) NOTE: Pay particular attention to porous and/or dry areas. These areas must be kept wet at all times with LIQUI-HARD. Once the surface begins to gel and becomes slippery, immediately spray the surface with a light water mist. Scrub the surface with a broom or mechanical scrubber to increase the penetration of the LIQUI-HARD. Continue to work the LIQUI-HARD into the surface for another 5-10 minutes or until the LIQUI-HARD becomes gelled and slippery for a second time. At this time, THOROUGHLY flush the surface with water. During the flushing process, agitate the surface with a broom to aid in removal of the excess LIQUI-HARD. Remove all excess material with a mop or squeegee. Thoroughly squeegee the surface dry. If there are slippery patches, this is an indication that there is still excess LIQUI-HARD present. These areas should be re-flushed and squeegeed again until the entire surface is dry. (Extremely porous surfaces may require a second application.)
WARNING: Failure to thoroughly wash and remove all excess material from floor surfaces may result in unsightly white stains. Immediately wash off over-spray from glass, aluminum, or highly polished surfaces with water to avoid etching of surfaces.
NOTE: For concrete older than 28 days, please contact a W. R. MEADOWS representative at 1-800-342-5976.
Burnishing... LIQUI-HARD can be burnished to a high sheen on steel trowel concrete floors. A high-speed burnisher (2000-2200 rpm) with appropriate maintenance pad is needed.
Drying Time...2-4 hours. LIQUI-HARD dries very quickly on new, virgin concrete. Drying times may be extended on existing (old) concrete due to surface conditions. Restrict foot traffic for at least four hours; 12 hours is preferable.
Cleanup...While still wet, equipment may be cleaned quickly and easily with soap and water. Do not allow LIQUI-HARD to dry before flushing excess from surfaces.
Precautions
DO NOT DILUTE. Do not apply if the temperature
of the concrete is less than 35º F (2º C) or above 135º F (57º
C). KEEP FROM FREEZING. If frozen, product should be thawed
and agitated slightly, prior to use.
Health Hazards
LIQUI-HARD is non-combustible. (Flash point is greater
than 210° F.) Direct contact will result in irritation of the
skin and eyes. Inhalation of product mist may result in
respiratory irritation. Refer to Material Safety Data Sheet for complete health and safety information.
This material last updated November 2007.
