Xenon Tetraflouride, or XeF4, is a not a polar molecule. XeF4's geometric structure and symmetry causes the intramolecular forces within the molecule to cancel out, making XeF4 a non-polar molecule.
As a result of xenon being the central atom with four fluorine atoms and two lone pair electrons attached to it, the molecule has an AB4E2 structure. The structure gives XeF4 a square planar molecular shape. The bond between xenon and fluorine are polar covalent because of the difference in electronegativity, but the four fluorine bonds cancel each other out. The electronegativity of the lone pair electrons also cancel each other out, making the entire molecule non-polar.