Abstract: A system for securely offixing to a structure at a recess therein comprises a container body filled with a main component and sealed with a cap formed in part by solidifying a hardening agent and an inorganic material with a solidifying agent. The cap may be formed by confining a hardening agent in a film or coated film of plastics. The container body is further subjected to flaw or strain working or otherwise formed to be weakened so as to break into small pieces when subjected to a force by the element. The main component and the hardening agent then react, within the recess, to securely affix the element to the structure. In another aspect of the invention, a method is provided for retaining the first component in its frangible container with a cap comprising the reactive or hardening agent for placement in a recess of the structure for forcible breakage of the container, a reaction and secure affixation by the reaction product.