As Pat said TB 111 it is not good for filling gaps which can be a problem.
The easiest I find,is Urac 185. Very good at gap filling and doesn't need a hot box.
Just needs to,be warm, I use a light bulb and sleeping bag when it is cold out.
The problem right now is the manufacturer is shutting down.
Mike at Nocking Point still has some. It is cheap and works well.
The distributer says they are working on another supplier.
If it goes away I will try to find Weld wood resorsanal glue.