A protective seal, a protective seal kit, and a method for sealing a joint region between pipes are provided. The protective seal includes a first wrap, comprising a corrosion-resistant material, wrapped around a seal region, contacting the outer surface of the pipeline assembly. A second wrap, comprising a self-adhering fiberglass composite, wraps around the first wrap. The kit includes a flexible wrap fabricated, in part, from a corrosion-resistant material, and a second flexible wrap fabricated, in part, from a fiberglass cloth impregnated with a resinous pliable-plastic material. The method includes wrapping a corrosion-resistant, inner wrap around first and second pipes such that this wrap surrounds the joint region and adheres to the pipes. A fiberglass-composite outer wrap is wrapped around the inner wrap and the first and second pipes such that the outer wrap surrounds the inner wrap and adheres to the pipes. The outer wrap is cured.