there is disclosed a plastics assembly for a viscous liquid dispenser . the plastic assembly includes an outer cover disc mated with a thin inner nozzle disc wherein the cover disc is dimensioned to be retained at a first end of a cylindrical tube of viscous liquid to seal the tube prior to dispensing commencing , cover disc having a frangible cover formed thereon . the thin inner nozzle disc includes an outer rim dimensioned to be received in the interior of the cover disc and the thin nozzle disc includes at least one nozzle aperture formed therein wherein the nozzle aperture is covered by the frangible cover .