UltraTileFix Pro Primer 1LSURFACE PREPARATION Ensure the application area is thoroughly dry and in a sound and stable condition. The surface must be free from contaminants that may hinder adhesion such as dust, oils and grease. All laitance and surface treatments must be removed. Surfaces must be roughened by mechanical scabbing to enhance the key. All surfaces should be free from dust and thoroughly clean before the primer is applied. Underfloor heating must be switched off