GENESIS C201 Concrete Pools Practice Test 2026 - Free Concrete Pools Practice Questions and Study Guide

The essential factor is preparing the plaster surface properly and choosing an adhesive that bonds well to plaster. Plaster must be clean, sound, and flat, with any loose material removed and cracks repaired. If the surface is dusty or slick, abrade or prime it as recommended, and ensure the plaster is fully cured and dry before tiling. Use an adhesive compatible with plaster, typically a latex-modified thinset mortar or other polymer-modified adhesive designed for plaster substrates. In damp or wet areas, follow with appropriate waterproofing or crack isolation as needed. Painting the plaster before tiling creates a seal that adhesives can’t bite into, and skipping substrate prep leaves contaminants and an uneven surface that lead to bond failure. So, proper substrate prep plus the right adhesive selection is what ensures plaster adhesion.