In a message dated 8/6/2006 10:48:33 AM Eastern Daylight Time, oiseming at moscow.com writes: << I've had good luck sealing small water leaks with water glass (socium silicate) >> Wasn't there a whole discussion on "rusting" small cracks a while back on the list? Tom Schmutz Concord, Va. USA Germoamer at aol.com