Purchasing a brush “ITALSIR” you have a product realized with the best first subjects, taken care of in the details and suit of bar code. To get the good result, recommends him to bathe your brush in water the day before the use. After having made to dry it you must emphatically brush it to perfectly remove not those bristles you glue. Just finished using it, wash it very well avoiding deposits of product at the base of the bristle, and then do you him to dry suspended. If supported it would be able not to correctly dry and to produce mold. You must absolutely avoid to make it fall to the ground, in how much the mastic could break. Good job.