Black tar or creosote is a byproduct of wood burning that can seep into chimneys and the inside of flues. It can cause long-term issues if it's not removed. Understanding what creosote is and how it can affect the chimney is essential in ensuring the fireplace is safe.

Safety is a concern every time a homeowner uses a fireplace. However, chimney liners can help give owners an extra security measure against potential hazards from a lit fireplace.