It was easy to pull out the old gasket and replace with the new. Be sure to use the hair dryer to work out any kinks. I thought that I had done a good job before installing it but noticed that the kinks were still partially there after I finished the installation which kept it from sealing properly. A little more patience with the hair dryer and it works great. Installed two weeks ago and no issues since. FYI - you will not get a great seal at first, you need the freezer to operate for about 12 hours and then it will keep the seal.