Spooze

A little bit of detecting and i found the bisque glue formula that can be used to attach broken pieces or mend cracks,  It seems to me that we also used calcined powdered clay when wanting to use it on bisque,
from the ceramic arts question list :
"Another concoction for repairing bisque is "spooze" (originally attributed to Peggy Heer by Vince Pitalka):

Mix equal parts by volume vinegar, corn syrup, and powdered claybody. Add more powdered claybody to adjust the thickness of the spooze to your need. Both surfaces should be dampened to assist adhering. Some add toilet paper pulp to the mix."