Seared Stone is the Tinker's Construct counterpart of vanilla stone. Seared Stone is used to make various patterned blocks, most notably as an alternative rout of making Seared Bricks.
Melting cobblestone Smeltery and pouring 100mb of Seared Stone into a Casting Basin will produce one block of Seared Stone. This takes much longer than using Grout to make Seared Bricks, but can be useful for a player who is low on gravel and sand.
Crafting four Seared Stone in a 2 by 2 square produces one Seared Brick.