A window clamp is used to hold a vehicle window within a vehicle door. The window clamp includes first and second clamp arms that are secured together with a fastener. A seal is inserted into a gap between first and second clamp arms. The seal includes first and second seal arms that engage both side surfaces of the vehicle window. The first and second clamp arms each include a slot. Portions of the seal are snapped into each slot to secure the seal to the window clamp.