High purity and finesse gives the plaster good resistance and a fine finish. Requiring little treatment for the application of paint.


The water used must be clean, free of oils and solvents to ensure a perfect setting.

• the excess water in the mixture causes a slow setting and least resistance of the finished product.
• A stucco of quality has a mix of one to one.
• plaster setting requires a certain amount of water, which is why it is important to respect the proportions of the mixture is recommended.
• COBOCE plaster has a fast setting, which requires a greater speed of application, which allows better performance in the labour force.


To mouldings, it is recommended that water/plaster relationship is something less than one, i.e., that the amount of added water does not exceed the amount of gypsum in volume in the mix.