Profile: Abesco, LLC is a manufacturer and installer of intumescent passive firestop systems. Our passive firestop products are designed to restrict the passage of fire throughout a building. Our abesco CP310 FR acrylic intumescent caulk is designed to prevent the spread of fire from one compartment to another. We also provide cable coating services. Our abesco intumescent mastic is single part water based acrylic mastic, which provides a firm but flexible seal to joints in a variety of fire rated structures.