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Concrete Sealing & Curing

Liqui-Hard®

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.


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.

SPECIFICATIONS

  • Complies with SCAQMD maximum allowable VOC requirement.

  • Dried film is USDA accepted.

FEATURES/BENEFITS

  • Penetrates deeply into concrete to densify and harden surfaces to help prevent entry of moisture and other foreign matter.

  • Dustproofs and improves chemical, petroleum, and abrasion resistance of treated surfaces.

  • Provides a permanent, attractive sheen with the ability to polish.

  • Protects against scratching or peeling.

  • Provides tough, protected surface that won't after-yellow, discolor or show pedestrian or vehicular traffic wear marks.

  • Improves light reflectance.

  • Ready to use from container and easy to apply.

  • VOC-compliant ... VOC content is 0 g/L.

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 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 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 35˚ F (2˚ C) or above 135˚ F (57˚ 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.

Download Liqui-Hard Brochure

 

Liqui-Hard® Ultra

Molecular Concrete Densifier and Chemical Hardener

DESCRIPTION
LIQUI-HARD ULTRA concrete densifier and chemical hardener is a ready to use, colorless liquid, which hardens and dustproofs concrete at a molecular level.  After proper application, the finished surface offers substantial improvement in abrasion and chemical resistance and will significantly improve the durability of the surface when compared to untreated concrete.  As LIQUI-HARD ULTRA is applied and penetrates into the concrete surface, a chemical reaction takes place, producing a byproduct that fills in the pores of the concrete one molecule at a time.  LIQUI-HARD ULTRA solidifies the concrete, eliminating dusting and pitting.

LIQUI-HARD ULTRA is chemically engineered to provide timely, quick, sustainable performance.  The product is simply sprayed on, and then left moist on the surface for 20 minutes.  In this short period of time, the colorless liquid quickly penetrates into the surface.  Unlike traditional densifiers, LIQUI-HARD ULTRA does not require brushing into the surface or rinsing.  After application, the resulting surface features enhanced protection and sheen, coupled with superior abrasion resistance.  This environmentally safe, water-based product features a zero VOC content and provides an attractive option in green building applications.

USES
LIQUI-HARD ULTRA 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 ULTRA can successfully be used in conjunction with shake-on hardeners.

 

SPECIFICATIONS
  • Complies with SCAQMD maximum allowable VOC requirement.
  • Treated surface is USDA accepted.
FEATURES/BENEFITS
  • Intimate molecular reaction penetrates deeply into concrete to densify and harden surfaces to help prevent entry of moisture and other foreign matter.
  • Quick and easy, hassle-free application procedure (no flushing or rinsing required).
  • Does not require brushing into the surface or rinsing  (except in puddle areas).
  • Improved freeze/thaw resistance.
  • Dustproofs and improves chemical, petroleum, and abrasion resistance of treated surfaces.
  • Provides a permanent, attractive sheen with the ability to polish.
  • Protects against scratching or peeling.
  • Provides tough, protected surface that won't yellow, discolor or show pedestrian or vehicular traffic wear marks.
  • Improves light reflectance.
  • May be burnished.
  • Compatible with BELLATRIX for an enhanced concrete floor.
  • Ready to use from container and easy to apply.
  • Saves time on the polishing/burnishing process.
  • Indoor or outdoor use.
  • Environmentally safe, non-hazardous.
  • VOC content is 0.00 g/L.

APPLICATION
Surface Preparation...Fresh Concrete: On newly placed concrete, LIQUI-HARD ULTRA can be applied, as you would a cure, after final troweling.

For a curing and hardening system, use MED-CURE™ curing aid from W. R. MEADOWS immediately after final finishing operations have been completed.  Apply LIQUI-HARD ULTRA according to below existing concrete directions a minimum of three days (preferably 28 days) after placement of concrete.

Existing (Old) Concrete: Surface should be clean and structurally sound. Remove all residues, curing compounds, oils, sealers, contaminants, and laitance before applying LIQUI-HARD ULTRA. ULTRITE® DEGREASER from W. R. MEADOWS may be used for cleaning.  Fill and repair all holes, cracks, and deteriorated areas that have been removed to sound concrete.

Mixing...For optimum performance, gentle mixing or agitation is recommended.

Application Method...Fresh Concrete: Apply undiluted LIQUI-HARD ULTRA at approximately 650-800 ft.²/gal. (15.95-19.63 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 ULTRA by sprayer, squeegee, or broom.  Keep surface moist with LIQUI-HARD ULTRA for 20 minutes but do not let material stand and puddle.  NOTE:  Pay particular attention to porous and/or dry areas.  These areas must be kept wet at all times with LIQUI-HARD ULTRA.  After initial 20 minutes, let the surface dry.

Note:  For concrete older than 28 days, please contact a W. R. MEADOWS representative at 1-800-342-5976.

Burnishing … LIQUI-HARD ULTRA 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.

WARNING… Immediately wash off over-spray from glass, aluminum, or highly polished surfaces with water to avoid etching of surfaces.

Drying Time ... 2 - 4 hours. LIQUI-HARD ULTRA dries very quickly on newly placed 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.

PRECAUTIONS
DO NOT DILUTE. Do not apply if the temperature of the concrete is less than 40˚ F (4˚ C) or above 135˚ F (57˚ C). KEEP FROM FREEZING.  If frozen, product should be thawed and agitated slightly prior to use.

HEALTH HAZARDS
LIQUI-HARD ULTRA is non-combustible. (Flash point is >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.

DUROSEAL is a ready to use impregnating, surface curing liquid, which provides an outstanding protection for the fresh concrete as well as for the dry shake hardener treated industrial floors against drying. It can also be utilized for impregnating stone coatings.

Download Duroseal Brochure 

 

DUROCURING is a ready to use impregnating liquid that provides efficient curing and protection against drying for new floors constructed from plain concrete or with dry shakes surface hardeners.

Download Durocuring Brochure