Device for dispensing a pressurized material

A device for dispensing a pressurized material, the device comprising a body defining a pressurizing chamber containing a gas generator, and a tank containing the material to be dispensed, said tank being defined by an end wall having an outlet orifice, the device further comprising a piston configured to move inside the body, the piston separating the pressurizing chamber from the tank, the gas generator being configured to trigger the dispensing of the material to the outside of the body through the outlet orifice by causing the piston to pass from a material-storage, first position to an end-of-material-dispensing, second position in which the piston faces the end wall;

• the piston, when in the first position, presenting a housing that is closed by a fragile portion beside the pressurizing chamber and that is open beside the tank, the housing containing a striker element that is held in said housing and that defines a channel opening out into the tank, said striker element presenting a first length greater than a second length of the housing and projecting from the piston so that the fragile portion is broken by the striker element when the piston is in the second position.