Abstract: A snap in weatherstripping where the backing has a plurality of alternating notched out spaces along each side to facilitate ease of insertion into a channel without the need to slide the weatherstripping longitudinally into the channel. The snap in weatherstripping can be pushed into the channel with a gentle side to side or rolling motion, thus eliminating the difficulties associated with longitudinally sliding a weatherstripping into a channel. The snap in arrangement of the weatherstripping eases replacement, and also accommodates variations in tolerance between the weatherstripping and the channel, making it desirable for replacement of existing degraded weatherstripping.