I’m almost positive those are made by BakFlip. I’ve had 3 Bakflip covers and only 1 was totally waterproof out of the box. You can use foam weatherstripping from any hardware store/home improvement store. I used some good quality electrical tape for some of the hinges that were open on my current cover. You can also just get some clear flexible tubing to replace the drains. I got it used for $100 and have used it on two trucks, so I’m ok with a few minor fixes. For $30 you got a killer deal. I think it’s nearly impossible to get a 100% waterproof cover that is also as convienent and flexible as a folding cover (extang, Bakflip, etc). Once you resign yourself that it’s ok to see a few drops of water after a thunderstorm you’ll be much happier with your $30 purchase!