Yes. Use acetone to clean the crack. You must get any type of oil, etc out the crack for the epoxy to bind correctly.
Find a good, two part, high strength epoxy. Preferably a type that is used in the boat building industry. You want an epoxy that is tough, as well as flexible and weather proof.
Carefully flex the crack open
Warm the crack with a hair dryer and coat the crack with properly mixed epoxy.
Close the crack using clamps. Wipe off excess epoxy.
Let it cure fully.
After curing, blend the dried epoxy with the surface of the wood, cleaning off any dried excess. Match the finish to the wood and you’re good to go.
