Store in dry conditions, between 40° F and 95° F (4° C and 35° C). Keep from freezing.
Apply TOP-STOP with a low-pressure sprayer immediately after screeding when concrete has lost its sheen, or as soon as bleed water has disappeared. Apply only after all finishing operations are complete. Avoid puddles and over spraying.
Cover concrete with wet burlap or plastic sheeting to prevent drying out. Secure the edges of the plastic sheeting to prevent ballooning. Do not use curing compounds. Concrete admixtures which affect the setting time should not be used without first conducting a test patch. Periodically check concrete to determine depth of retarded mortar, making sure concrete hardens.
Within 12-24 hours of application (depending on temperature and humidity), remove burlap or plastic sheeting one section at a time and wash the retarded surface mortar using a low-pressure garden hose and stiff broom. Do not use excessive force. Test a small area to determine if depth of retarded mortar is at desired level. If the depth is greater than desired, allow the slab to cure longer before exposing the aggregate.
Stone color can be enhanced using EXPO-GLOSS® exposed aggregate surface sealer from W. R. MEADOWS.
Cleanup … TOP-STOP may be easily removed by water and scrubbing with a wire brush.
Apply only on freshly poured concrete. Depth of the exposed aggregate will be affected by extreme temperatures, as well as the water pressure and scrubbing action used during removal. A test patch under exact job conditions is recommended. Do not use on vertical concrete or form applications. Do not use on concrete containing calcium chloride or other set accelerators. Do not apply to frozen surfaces. Protect treated area from freezing. Do not store in metal sprayers for long periods of time.
Direct contact may result in mild irritation. Refer to Safety Data Sheet for complete health and safety information.