After 10 months of occasional use, no longer vacuums/seals. It pumps air out but I have to manually heat the sealing button and even then it may or may not seal. I figured if you spend more you'll get a reliable product. UPDATE: I wasn't aware that this particular sealant has a 5 year guarantee. I called the company and explained the problem. They have emailed asking for info on where to buy, pick up etc. I got a reply today and they are sending me a new seal.
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