The embodiments herein provide a device for sealing an interface having an opening for a wire to pass through the interface. A pair of sealing blocks may be used where one block contains a protrusion and the opposing block contains a recess. The protrusion and recess preferably have an apex with a round having approximately the same dimension as the radius of the wire. A pair of posts may be positioned on opposing sides of the opening. One sealing block may contain an aperture for accepting one of the posts while the second sealing block may contain an aperture for accepting the opposing post. The posts may be threaded so that they can accept a threaded fastener. Exemplary embodiments may utilize mounting plates which may contain a flange such that squeezing the opposing flanges together can cause inward forces on the sealing blocks.