Thanks for the replys!!!! Any kind of clear silicon? I have the pool drained just under return. So I'm ready to replace it. The old setup has silicon on the inside and out. A full bead and I was questioning if i needed it this time. The guy at the pool store said no, i wouldn't need silicon. But i'm feeling i need it. not alot, jut enough to make a seal on both sides. I bought the whole setup. it came with 3 gaskets. 2 white rubber gaskets and 1 cork??? I was told the cork went on the outside, and 1 rubber gasket went between liner and pool wall, and the last went between liner and the return. Hopeflly I get it right.