I used a patch I bought from walmart....that was the first mistake I made...it did not hold properly, waste of money. frustrating. next mistake...buying a patch from American sales....why I thought this would be a smarter option....I cannot answer you....As you can imagine...same issues. ugh. irritated beyond belief at this point in time. finally decided to say screw it and have someone who actually does this for a living come out and take a look at what I was doing wrong. half of my paid price for the patch (WHICH ACTUALLY WORKED) stayed in my account for when I needed a new liner down the road. the patch is still holding up after a few weeks. fingers crossed!!!