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Please call 717-792-2627 or email wrmpa@wrmeadows.com for more information. |
DESCRIPTION
CS-309-25 OTC acrylic curing and sealing
compound is a clear, transparent, ready-to-apply,
non-yellowing liquid compound formulated with
special acrylic polymers and VOC-exempt solvents
that effectively cures and seals freshly placed
concrete.
Once properly applied, CS-309-25 OTC provides a premium-grade seal for optimum moisture retention. This produces a hard, dense, high compressive strength concrete. CS-309-25 OTC will minimize hair checking as well as premature cracking, dusting, spalling and other common defects that result when concrete is not properly cured. This easy-to-use compound dries quickly and protects the concrete during construction. It resists adhesion of mortar droppings and permits easier cleanup.
USES
CS-309-25 OTC is ideal for application on
commercial and industrial concrete surfaces,
sidewalks, patios, multi-level parking decks,
driveways, and parking areas … wherever you want
to simultaneously cure and seal exterior concrete
surfaces. The use of CS-309-25 OTC on any
exterior concrete surface provides a durable, long-lasting
finish that offers improved resistance to
chemicals, oil, grease, deicing salts and abrasion.
CS-309-25 OTC provides an attractive, glossy
finish that enhances the natural appearance of the
concrete.
For interior applications, specify and apply VOCOMP®-20 or VOCOMP-25 curing and sealing compound from W. R. MEADOWS.
FEATURES/BENEFITS
• Provides a totally clear membrane for new or existing concrete.
• Provides a tough, durable, uniform, premium-grade, long-lasting
film on exterior concrete surfaces.
• Ultraviolet stable; non-yellowing under extreme exposure.
• Cures and seals freshly placed concrete simultaneously in one application.
• Produces a premium-grade seal, yielding optimum moisture retention.
• Minimizes hair checking, cracking, dusting, spalling and other defects
common to improperly cured or uncured concrete.
• Provides improved resistance to chemicals, oil, grease, deicing salts
and abrasion during construction.
• Produces a hard, glossy film that enhances the natural appearance of
concrete.
• Applies easily ... dries quickly for less down time.
• Permits easy cleanup and housekeeping ... reduces floor maintenance
costs.
• VOC compliant … VOC = 342 g/L.
PACKAGING
1 Gallon (3.79 Liter) Cans (6 per case)
5 Gallon (18.93 Liter) Pails
55 Gallon (208.20 Liter) Drums
SPECIFICATIONS
• ASTM C 309, Type 1, Classes A & B
• ASTM C 1315, Type I, Class A
• AASHTO M 148, Type 1 Class A & B
• US EPA U.S. EPA Architectural Coatings
Rule: 350 g/L maximum VOC for concrete
curing compounds.
• Ozone Transport Commission (OTC): 350 g/L
maximum VOC for concrete curing
compounds.
• Dried film is USDA accepted
COVERAGE*
300-600 ft.²/gal. (7.37-14.73 m²/ L).
*Coverage may vary due to porosity and condition of concrete.
APPLICATION
Surface Preparation … Existing (Old) Concrete: Concrete surface
must be clean and dry with all stains, oil, grease, dust, and dirt
removed prior to application. We recommend ULTRITE®
DEGREASER from W. R. MEADOWS for cleaning. New
Concrete: CS-309-25 OTC should be applied when surface water
has completely disappeared and the concrete surface will not be
marred by walking workmen.
Application Method … Applying by sprayer: Use a low pressure, high solids commercial-grade sprayer with Viton-equipped fittings. (Do not use garden sprayers or form oil sprayers.) The sprayer must be clean and dry prior to application. Follow the instructions provided by the sprayer manufacturer. W. R. MEADOWS recommends the Chapin Xtreme Industrial Sprayer model #19049 fitted with either the 5941 (0.5 gpm) or the 5943 (1.0 gpm) nozzle. Always apply a test area prior to full application using proper spray techniques and coverage rates. If spraying and back rolling, the optimum results are achieved if a second person can immediately back roll, following behind the spray applicator. Follow roller instructions below. Do not delay the back roll, as the area will dry quickly. If puddles occur, immediately brush or roll them out.
Applying by roller: Use a short nap (1/4” is ideal) mohair roller.
| To ensure proper film formation, the following steps should be followed carefully: |
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Note: Over-rolling or using incorrect rollers may cause bubbles to form in the film. If this occurs, a light application of xylene, rolled over the film, should eliminate the problem.
For optimum performance, apply first coat at 600 ft.²/ gal. After the first coat has thoroughly dried, apply a second coat at 600 ft.²/ gal. NOTE: The second coat should be applied at a right angle.
Drying Time ... CS-309-25 OTC dries quickly. Drying times may be extended depending on application rate, temperature, humidity and project conditions. Restrict foot traffic for at least four hours. Twelve hours is preferable.
Cleanup … Application equipment should be cleaned promptly after use with xylene or toluene.
PRECAUTIONS
DO NOT DILUTE. FOR EXTERIOR APPLICATION
ONLY. Surfaces treated with CS-309-25 OTC may become
slippery under certain conditions.
CS-309-25 OTC should not be applied during high temperature conditions in direct sunlight. These conditions cause rapid evaporation, which does not allow the film to form properly. Under these conditions, the film may peel, bubble and/or turn white (blush). CS-309-25 OTC should not be applied to concrete exposed to excessive moisture. Entrapped moisture in a solvent-based sealer may cause the film to peel and/or turn white (blush).
CS-309-25 OTC is a membrane-forming sealer. All membrane-forming sealers may darken concrete or magnify imperfections caused by variations in the porosity and/or finishing of the concrete.
Do not apply CS-309-25 OTC if the temperature of the concrete is below 40º F (4º C). CS-309-25 OTC may be used on colored concrete, but mottling may occur. Do not use on dense or non-porous surfaces, i.e. brick, stone, etc.
Concrete containing calcium chloride will remain dark longer when treated with CS-309-25 OTC. Concrete floors properly cured with CS-309-25 OTC meet section 8.9 "Adhesion of Tile Cements" of ASTM C 1315. For other specifications, secure the approval of the paint or resilient flooring manufacturer before applying CS-309-25 OTC. The specifier and user shall determine the suitability of product for specific applications and assume all responsibility in connection therewith.
HEALTH HAZARDS
Prolonged inhalation of vapors in excess of permissible exposure limits may
result in symptoms of transient central nervous system depression. Direct contact
with the product may result in irritation of the skin and eyes. Product vapors
may also cause irritation. CS-309-25 OTC is flammable. Remove
ignition sources prior to use. Empty containers may hold flammable vapors. Handle
empty containers as flammable liquids. In the event of a spill, contain the
product, apply absorbents and place in sealed containers. In the event of a
fire, contain all run-off water. Refer to Material Safety
Data Sheet for complete health and safety information.
This material last updated May 2008.
