This Seal-Tite ™ Window Foamcore Kit is designed to provide you with everything you need to seal a new window or repair a leaking window. The kit contains 88 Feet of foamcore butyl tape, enough to reseal 6-8 windows, depending on size. The Seal-Tite Foamcore requires no trimming, it will not sag or ooze, and it has excellent temperature resistance in warm and cold climates. The round shape of the foamcore butyl allows precise placement around the window radius.