Abstract: A dual chamber cover for hyperdermic needles to assure that they may not be reused and to prevent accidental pricking with a used needle. The first chamber serves to cover the needle initially prior to use. The second chamber which is inversely joined along its cylindrical walls to the first chamber has three reservoirs which contain respectively, a first component of a two component resin, a second component of the resin, and fiber filler. The reservoirs are separated by frangible disks. The second chamber is closed at one end and initially closed at the other end by a needle penetrable rubber disk. After a needle has been used, it is inserted through the rubber disk, through the first chamber and the first resin component, the first frangible disk, the second reservoir chamber and second resin component, the second frangible disk, and on into the third reservoir, mixing the resin components and fiber filler together which harden around the needle end to permanently prevent its reuse and accidental pricking.