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WR Meadows LIQUI-HARD 5 Gallon Pail
WR Meadows LIQUI-HARD is a water-based, ready-to-use clear silicate densifier and chemical hardener in a 5 gallon pail. It penetrates concrete and reacts to fill the pores, hardening and dustproofing the surface.
- Covers 300 sq ft/gal on fresh concrete, 200 sq ft/gal on existing concrete
- VOC content 0 g/L; treated surface is USDA accepted
- Can be burnished to a high sheen on steel-troweled floors
$193.91
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WR Meadows LIQUI-HARD 5 Gallon Pail
WR Meadows LIQUI-HARD (often searched as liqui hard) is a proprietary, water-based, clear silicate liquid intended to harden and dustproof concrete. As it penetrates, a chemical reaction produces a byproduct that fills the pores, leaving a denser surface that raises abrasion and chemical resistance and eliminates dusting and pitting. It is used in industrial plants, warehouses, and heavy pedestrian traffic areas, and with shake-on hardeners. This 5 gallon pail covers about 1,500 sq ft on fresh concrete or about 1,000 sq ft on existing concrete.
Key Features
- Penetrates deeply to densify and harden the surface against moisture and foreign matter
- Dustproofs and raises chemical, petroleum, and abrasion resistance
- Leaves a permanent sheen that can be polished or burnished
- Will not after-yellow, discolor, or show traffic wear marks
- Ready to use from the container; 0 g/L VOC
Applications
- Industrial plant and warehouse floors
- Storage silos, sewage plants, chemical processing facilities, and refineries
- Civic centers, arenas, stadiums, hospitals, airports, and museums
- Floors finished with shake-on hardeners
Technical Specifications
| Property | Value |
|---|---|
| Chemistry | Water-based clear silicate densifier and chemical hardener |
| Coverage, fresh concrete | 300 sq ft/gal (when used as a curing aid) |
| Coverage, existing concrete | 200 sq ft/gal |
| Coverage per pail | About 1,500 sq ft fresh, or about 1,000 sq ft existing |
| VOC | 0 g/L |
| VOC compliance | U.S. EPA, LADCO, OTC, SCAQMD, and other current North American VOC rules |
| Tested to | ASTM C779, ASTM F150, ASTM F609, ASTM G155, Taber Abrasion |
| Other | Treated surface USDA accepted |
| Dwell time, existing concrete | Keep wet 30 to 60 minutes, then flush |
| Drying time | 2 to 4 hours |
| Foot traffic | At least 4 hours, 12 hours preferred |
| Burnishing | High-speed burnisher, 2000 to 2200 rpm |
| Shelf life | 1 year unopened, stored indoors at 40 to 90 F |
| Pack | 5 Gallon Pail |
| Part number | 3325005 |
Product documents: WR Meadows LIQUI-HARD Data Sheet (PDF)
Frequently Asked Questions
What coverage does the LIQUI-HARD 5 Gallon Pail give?
300 sq ft per gallon on fresh concrete (used as a curing aid) and 200 sq ft per gallon on existing concrete, or about 1,500 or 1,000 sq ft for this 5 gallon pail. Rates vary with the finish and porosity of the concrete.
How is LIQUI-HARD applied to existing concrete?
The surface must be clean and thoroughly dry. Saturate it with undiluted LIQUI-HARD by sprayer, squeegee, or broom and keep it wet for 30 to 60 minutes. When it starts to gel and turn slippery, mist with water and scrub for another 5 to 10 minutes until it gels again, then flush thoroughly with water and squeegee the floor dry.
Does excess LIQUI-HARD need to be removed?
Yes. Failing to wash off all excess material can leave white stains. Slippery patches mean excess remains, so re-flush and squeegee those areas. Wash over-spray off glass, aluminum, and highly polished surfaces right away to avoid etching.
Can LIQUI-HARD be used on fresh concrete?
Yes, after final finishing and control joint installation, with a low-pressure, high-volume sprayer such as a Chapin 1949 with a 0.5 GPM nozzle. WR Meadows notes that MED-CURE may be a better choice for freshly placed concrete. Do not dilute the product and keep it from freezing; see the data sheet for concrete temperature limits.
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