1. Ensure that surfaces to be tiled are sound (no cracks or crumbling), clean, free of dust, release agent, fungi, or any surface dampness. Fungi must be removed and the spores killed with the use of an effective fungicide. (a dilution of household bleach is sufficient)
2. New walls and floors must be allowed to cure for minimum periods as listed below to ensure that movement due to shrinkage does not affect the installation

• a. Direct bedding onto new brick walls and concrete surfaces: 6 weeks
• New plaster walls: 2 weeks
• New screeded floors: 4 weeks

3. Very smooth surfaces such as steel trowelled and off-shutter concrete must be acid washed to remove laitance and then rinsed thoroughly with cold water. The surface must then be primed with a mixture consisting of two parts EZEE TILE BASECOAT ® mixed with one part EZEE TILE KEYCOAT ® and allowed to dry prior to tiling.
4. Painted surfaces, gypsum plasters and surfaces that have old bitumen adhesive on them must be chipped in order to expose at least 80% of the substrate. The surface must then be primed with a mixture consisting of two parts EZEE TILE BASECOAT ® mixed with one part EZEE TILE KEYCOAT ® and allowed to dry prior to tiling.
5. Highly porous substrates can negatively affect the bond strength of the tile adhesive. Check the porosity of the substrate by applying a small quantity of water. If the moisture is completely absorbed within one minute, then the surface is too porous and will need to be sealed with a mixture of two parts EZEE TILE BASECOAT ® mixed with one part EZEE TILE KEYCOAT ® and allowed to dry prior to tiling.