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This is an extended set, spray applied fire resistive material that can be left in the equipment and lines for up to 4 days without setting. It was developed to be used as a holding material to leave in the equipment and lines to reduce start up and clean up times when using the Southwest Type 5 materials. This material requires injection with Accelerator A-20 to reach final set. It is intended for use with Southwest Type 5GP and Southwest Type 5MD for application to interior structural columns, beams, joists, decks, walls, roofs, girders, floors and pre-cast concrete units.