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Concrete Curing Agent

GCC-31S Water-Based Cure - Structures & Slopes

GCC-31S water-base concrete curing compound is formulated from hydrocarbon resins and may be used on interior, exterior, vertical and horizontal concrete surfaces. Once applied, it forms a liquid membrane that retains an optimum amount of water present in freshly placed concrete to allow complete hydration of the cement. NOTE: After approximately four weeks, the membrane begins to chemically break down. When the curing cycle is complete, the membrane will eventually wear off the surface. This process usually takes another three to five weeks under normal traffic and weathering conditions. GCC-31S meets the maximum Volatile Organic Compound (VOC) content of 350 g/L for concrete curing compounds as required by the U.S. EPA Architectural Coatings Rule.



GCC-31S has been used on both interior and exterior applications where paint, resilient tile or resilient flooring was applied later. Because of the wide variety of paints and adhesives for carpeting and resilient tile in use, contact the manufacturer of the flooring system for application approval over resin-type curing compounds. A small test application is also recommended.



When properly applied, produces an impermeable film which optimizes water retention.

Furnished as a ready to use, true water-based compound.  Produces hard, dense concrete - minimizes hair-checking, thermal cracking, dusting and other defects.  Enhances the functional capabilities of concrete by "sealing in" the performance assets of strength and long life.  Offers a compressive strength significantly greater than improperly cured concrete.  Increases tensile strength for greater resistance to cracking and surface crazing.  Improves resistance to the abrasion and corrosive actions of salts and chemicals...minimizes excessive shrinkage.  Can be applied quickly and easily with conventional commercial spray equipment.   VOC compliant.



Dries in approximately one and a half (1 ½) hours. Restrict foot traffic for at least four (4) hours. Twelve (12) hours is preferable.

FLASH POINT: Greater than 210° F (99° C) 

ASTM C 309, Type 1, Classes A & B (Type 1-D also available)

AASHTO M 148, Type 1, Classes A & B (Type 1-D also available)

CALTRANS System 4 


5 gallon (18.93 L) pails

55 gallon (208.20 L) drums

278 gallon (1040.99 L) totes



Approximately 200 sq. ft./gal. (4.91 sq. m./L).




Application equipment must be clean and free of any previously used materials.


For optimum performance, gentle mixing or agitation is recommended.

CAUTION: TO AVOID FOAMING, DO NOT MIX EXCESSIVELY. In the container, the product will appear ivory in color. However, it dries to a clear, transparent coating with a very slight amber tint.

Application Method:

Apply in a uniform film to horizontal surfaces as soon as the surface water disappears and the surface will not be marred by walking workmen. On vertical surfaces, apply promptly after the forms are removed. May be applied with a typical commercial hand or power sprayer. Use a Chapin 8005 or equivalent spray tip that produces a flow of ½ gallon (1.89 L) per minute under 40 psi (.276 Mpa) of pressure.


Prior to drying, clean up can be accomplished with soap and water. Once dried, it will be necessary to clean up with mineral spirits

or other suitable petroleum distillate.



KEEP FROM FREEZING. Do not apply if concrete temperature is less than 40°F (4°C). DO NOT MIX WITH COMPOUNDS CONTAINING SOLVENT - SEPARATION WILL OCCUR. DO NOT ADD OR DILUTE WITH ANY OTHER COMPOUND. SURFACE MAY DISCOLOR AND/OR YELLOW DUE TO OVER-APPLICATION. Do not paint or apply resilient flooring over any GCC-31S cured surface without first checking specifications and securing the approval of the paint or resilient flooring manufacturer.


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