In an embodiment, a plug formulation includes a mixture of a first part of a two-part epoxy system and artificial platelets formed from a polymeric material that expands upon exposure to ultraviolet (UV) light, moisture, or heat, wherein a portion of the first part of the two-part epoxy system is covalently bonded to a portion of the artificial platelets. In another embodiment, a plug formulation includes a mixture of a first part of a two-part epoxy system, an acrylate monomer, and artificial platelets formed from a polymeric material that expands upon exposure to ultraviolet (UV) light, moisture, or heat, wherein a portion of the first part of the two-part epoxy system is covalently bonded to a portion of the artificial platelets.