In one aspect, the present disclosure includes a curtain wall panel having an inner core material sandwiched between two outer walls and at least one elastic member inserted into at least one channel formed by the inner core material. In some aspects, the present disclosure provides a curtain wall system including a plurality of adjacent panels of the present disclosure and at least one joining member configured to be received within a recess formed by the at least one elastic member of at least two of the plurality of adjacent panels. In another aspect, the present disclosure provides a method for assembling a curtain wall system of the present disclosure.