Generally, no. But, in this case, you should either hunt around for a better fitting crystal (gens are always best, though you may then need to mod the bezel) or use UV glue.
The bezel is designed to fit tightly around the crystal & should be pressed onto the case, which forms a seal. As has been discussed ad nauseum, there is no real QC & little consistency among aftermarket parts. DW's cases are especially notorious for having ill-fitting components & causing constructors much grief.