I used a toothpick and some liquid silicone sealant... put a small dab on each of the 5 "corners", let it tack up a bit, plopped the gasket down in there, held it in place a few seconds (like 45) then they stayed put long enough to get the bowls on. My old one(s) leaked and I got K&L rebuild kits that came with the rubber round rings for gaskets... no biggie, just a bit of patience.