Chair Doctor glue does exactly what the name implies; it fixes chairs. If a chair has a loose rung, an injection of Chair Doctor glue will first swell the rung and then bond it in position. The secret is the low viscosity. It will soak into the end grain of wood, swell the wood and then freeze the wood in the swollen state as it cures. A film of dry glue lines the wood cells, preventing contraction.
Chair Doctor Pro includes 4 fl oz of glue, 1 syringe, and 3 sizes of blunt-tip needles.