You can successfully use synthetic construction mastic on concrete surfaces, provided the concrete is completely cured, clean, dry, and properly primed. Floor tile mastic, cove base adhesive, and specific heavy-duty construction mastics are frequently engineered to bond vinyl tiles, wood flooring, or wall panels directly to concrete subfloors. However, you must carefully check manufacturer specifications, because standard water-based mastics will fail if exposed to hydrostatic moisture rising up through unsealed concrete slabs.
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