Q: Is there a good sealant to spray where tree limbs are removed?

A: No sealant is needed or recommended after removing a limb. Trees repair wounds by internally “walling off” the damaged area. Tar and other materials retard the process of healing. They also may provide hiding places for insects and disease underneath. If the pruning cut is done correctly, just beyond the trunk collar from which the limb emerges, the tree will grow over the wound in a few years.