An application device for applying a composite substance onto a site is provided that operably applies a composite substance formed of at least two reaction substances which react with one another. The application device includes a receptacle for receiving a fluid. The receptacle has a support element having a working end on which a reaction substance is supported and the receptacle is operable to guide the one reaction substance into reaction contact with another reaction substance to thereby effect the formation of the composite substance. The receptacle is configured with respect to another receptacle which receives therein a reaction substance such that the receptacle comprises either a shaft portion of a grip or the grip itself of the other receptacle adapted to be gripped by a user in deploying the other receptacle.