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Asked a question 2 years ago

A question for those experts in concrete: I am a figurative sculptor and am exploring alternatives to outdoor sculptures that are created in mediums other than bronze. (so my clients have more of a choice) I am currently experimenting with a life-size full figure sculpture that has been sectioned and is fired to cone 6 (high fired) in my kiln. These sections will be glued together, void filled and will also have a steel armature inside the sculpture. One the sections are all assembled, I plan to use portland cement with a polymer additive for strength to 'chase' the seams and blend them together. The seams will be no thicker than 1/4 to 1/2 inch thick at the most, and most of it will be feathered onto the fired clay to blend the seams. After this I will apply Lastiseal (sealer for brick and concrete) and they suggest that if applying over concrete to wait 28 days. My question: if the concrete I am using is such a thin application do I still have to wait that long before applying the sealer? How long should I wait? Thank you.

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