Before applying adhesive with a roller, it is crucial to ensure that the substrate is extremely clean. When you are standing to apply the adhesive with a roller, you may not see grains of dirt or other debris that you might otherwise would have noticed with a trowel application. It is always a good idea to vacuum the floor with a high-quality vacuum system before application. In addition, make sure that your floor is flat (as opposed to smooth). Roller-applied adhesives go down very thinly, so any substrate defect left on the floor is probably going to show through. We recommend using a MAPEI self-leveling compound before installing Ultrabond ECO 379 to ensure a flat, porous substrate on which to work.
MAPEI's Planiprep SC skimcoating compound, Planipatch patching compound, Mapecem Quickpatch concrete patch and Planiprep PSC patch and skimcoating compound can be used to fill holes, voids and minor irregularities in concrete. No additive or primer is required when applying these products directly over clean, porous concrete.
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