Can't say for sure without seeing the pictures, but I agree with Joe. TB won't fill gaps. Get yourself some gel superglue (CA glue), lay it on thick, heat it up slightly with a heat gun to help it run down in the crack. Clamp it slightly to remove any voids, add some more glue and heat, and then clamp it up. Again, without pictures it's hard to conjecture. If the crack is very big you'd have to go with an epoxy.