Cast a jobsite sample at least 21 days prior to the installation for approval of color and finish. Utilize all materials, tools, and techniques from the actual job in the mock-up. Consistent batching, pouring, finishing, curing, sealing, and preparation techniques, will ensure the uniformity of architectural concrete. Verify adequate wet and dry slip resistance. Maintenance requirements should also be discussed.
APPLICATION
Cover and protect adjacent surfaces near the work area prior to applying SikaColor®-300 Antiquing Release. This is especially critical on windy days. Application of SikaColor®-300 Antiquing Release can begin after the final concrete finish.
Immediately prior to the placement of SikaStamp® tools, broadcast SikaColor®-300 Antiquing Release uniformly over the surface with a soft bristled, 6 inch mason’s brush. Apply enough release so that the moist sheen on the concrete surface is covered. Do not apply over standing bleed water. SikaColor®-300 Antiquing Release should not be broadcast for more than a few feet or from above the knee to minimize drifting outside of the work area. Multiple colors of SikaColor®-300 Antiquing Release may be used for more unique colorations. Once applied, do not work the surface with a float or a trowel. The surface of the imprinting tools should also be lightly brushed with the release powder.
Timing is critical; applied too early, the antiquing release may be difficult to remove; applied too late, and most of the antiquing release will be removed during the removal and cleaning process.
An antiquing method may also be applied to concrete surfaces and cementitious overlays after the imprinting process has been completed. This method is useful when more accent color is desired on a new installation or as a means of rejuvenating an older, unsealed weathered surface. Detailed information about this process can be found in the SikaColor®-350 Antiquing Agent Product Data Sheet.
REMOVAL
After imprinting has been completed, the residual SikaColor®-300 Antiquing Release must be removed to prevent tracking and loss of adhesion when a sealer is applied. Do not clean the surface until the concrete has cured for 24-48 hours. Cold temperatures may delay the cleaning process, since the concrete will require a longer cure time. Cleaning too soon may cause complete loss of the antiqued color, as well as damage to the colored concrete substrate. A small area should be test cleaned to evaluate the cleaning process and the resultant colorations.
Sweep or vacuum excess release, and follow by scrubbing with a soft bristled brush and water. Water can be applied with a garden hose or a high pressure wash. With either method, take care not to damage the surface of the curing concrete or remove too much antiqued colorations. Protect adjacent surfaces from runoff. Dispose of all residual materials in accordance with local, state, and federal regulations. The antiquing release is mechanically bonded to the concrete, so the surface must be sealed and maintained to preserve its antiqued appearance over time.
SEALING
After SikaColor®-300 Antiquing Release has been removed from the surface, SikaCem®-100 Clear Guard® should be applied after the concrete has thoroughly dried for a minimum of 72 hours at 70°F (21°C). Approve final color before the sealer is applied. Sealed surfaces may become slippery when wet. Sealed surfaces will require maintenance.
