Nancy's Tip of the Month A seam sealant like Fray Check is a must to seal all serger thread tails or edges. If squeezed directly to the fabric, you may get more than you bargained for. Apply the sealant to a Q-tip and then dab your fabric for greater control. 

Nancy Zieman can be seen on public television.
http://wpt.org/sewingwithnancy/
Nancy Zieman