The HeatShield Flue Sealant & Repair System was developed to restore flue tile
and masonry chimney interiors to their original integrity. In suitable chimneys,
HeatShield can provide a very effective and durable repair system. It can be
applied solely to open mortar joints, or a thin coating can be applied to the
entire flue to fill joints, seal cracks, and structurally reinforce clay flue lined
chimney interiors.
