Getting glue into tight places can be difficult, this could be the answer.
The Rockler Needle Point Glue Injector has a 31mm long stainless steel needle that can reach where no other glue applicators can go.
The small bottle means the glue will stay useable for longer as there is minimal air contained in the bottle, less when the bottle is collapsed slightly. Bottle capacity is 14ml.
Whether it’s grooves, cracks or small diameter dowel holes, this is the way to get the glue where it’s needed.