Heat sealable barrier paperboard

A paperboard comprising:

• a paperboard substrate having a first side and an opposing second side, the substrate having a caliper from about 10 to about 24 points;
• a heat sealable barrier layer applied on the first side as an aqueous coating forming an outer surface for the first side, wherein the aqueous coating comprises:
• a pigment blend;
• and
• a binder having a glass transition temperature above 20° C.,
• wherein a ratio of the binder to the pigment blend is at least 1 part binder per 1 part pigment blend, by weight;
• and
• a printable coating on the second side,
• wherein the paperboard has a blocking rating below 4, and
• wherein the paperboard is at least 90% repulpable.