PURPOSE: To mix and discharge a coating agent and a filler in an extremely simple manner by a method wherein a main agent of a resin is received in a main agent container part and a stirring blade is preliminarily built in the container part and a curing agent is added to the main agent from a discharge port and a stirring rod is subsequently inserted in the container part to be connected to the stirring blade to be moved up and down.

CONSTITUTION: An aluminum foil (c) is bonded to the vicinity of the discharge port of a main agent container (d) in such a state that the discharge port of the container is turned downwardly and a metal stirring blade (x) having large mass is inserted in the container (d). Subsequently, 300g of a mixture prepared by mixing a very small amount of a curing accelerator with a main agent such as a vinyl ester resin or Diclite(R) UE 5101L is received in the main agent container (d) and a lid is applied to the container (d) by a cylinder equipped with a pipe-like projection (j). Next, the main agent container (d) is inverted so that the discharge port (b) thereof is turned upwardly and, thereafter, a cap (k) is fitted in a curing agent container (y) and a part of the leading end thereof is cut to screw the cap in the discharge port (b) of the main agent container. Next, a cap (a) is fitted to the main agent container and the container is shaken 20 times up and down to move the stirring blade (x) to stirr the main agent and the curing agent. By this method, large effect can be expected even in a manufacturing line.