Abstract: A method for injecting a chemical barrier into a surface aperture is provided. The method provides a vacuum to a work site to evacuate the air from the work site. Then, an injector head is located and retained at the work site. The injector head has a gasket that forms a seal around the work site. Pressurized fluid is conveyed to the work site through a first conduit in the injector head. Any unused fluid is conveyed away from the work site by a second conduit in the injector head.

Abstract: A barrier injection apparatus for injecting a barrier at a site characterized by a holder for holding the apparatus in place against the force of injection; at least one injector for injecting a medium for a barrier at the injections site when in place; respective conduit system extending from the storage unit, and including a pump for inducing pressure onto the medium, to the injection site for injecting the medium at the injection site under pressure; storage unit for storing the medium at atmospheric pressure and being connected with a suction side of a pump that will introduce pressure; a second conduit connected with the barrier injection apparatus and adapted to remove unused medium from the site, an adjusting mechanism for adjusting the injectors to a correct distance; and a gasket sealingly surrounding the injection site for constraining the medium to flow into the site under pressure and insulate the medium from a holding mechanism. Also disclosed are specific preferred embodiments.