Chemicals including epoxies, multicomponent mixtures of epoxies, curing agents and aggregates, multicomponent mixtures of urethanes, and multicomponent mixtures of urethanes, resins and hardeners; chemicals for coatings for floors, walls, ceilings and other surfaces; chemicals for polymer coatings for floors, walls, ceilings and other surfaces; coatings for floors, walls, ceilings and other surfaces including coatings which are mixed and formulated on site