An apparatus, system, and method for repairing or reinforcing a damaged oil containment boom. The apparatus includes two end connectors and a curtain attached between the two end connectors. The end connectors are attached to a damaged, existing boom via a vertically extending slot formed in each of the end connectors. After attachment, a tight seal is formed between the curtain and the damaged boom. The method for reinforcing a boom includes engaging the two end connectors to an existing boom while stretching the curtain over the damaged boom section in an overlapping relationship. Finally, the connectors are locked into place via a lock-pin mechanism. This invention creates a tight seal over the damaged area, creating a “patch” to keep out oil contaminants from the protected area. The disclosed invention can be used to repair, patch, or reinforce an existing oil containment boom.