Sid, First, clean area with clean dry rag. Now, silicon the area you wish to seal. Now, fine spray over the slicon with soapy water. Now, wet your finger(s) and then run your finger alonge the silicon. " The idea is that because the silicon that you laid down only covers a small area, then the soapy water will stop the overspill of silicon sticking to the tiles.... "pb" I do beleve I said use a smaller nozzel some in my last message,?? It works for me, and smaller the siliscon work the better the finish. ....................John 2000.