I have tried the Unicolor drum seals in very hot water to try to stop leaks but the seals ended up stretching and now don't really fit properly. The leaks were worse. I then tried the silicon treatment and it didn't really stop the leaks fully. I then put the original Unicolor seal back in over top of the silicon and "WOW" - no more leaks! I've used the drum at least 10 times since and everything is still dry - not a drop! If you've put silicon in the lid already try it with the Unicolor seal back in.