Cover or seal insulation with preformed plastic covers, canvas strips, sealant, or tape to secure insulation to the structure - according to the type of insulation used and structure covered, using staple gun, trowel, paintbrush, or caulking gun. Job Summary: The Insulator will apply, remove, and repair insulating material to exposed surfaces or structures, such as air ducts, hot or cold pipes, storage tanks, boilers, and buildings to help control noise and maintain temperatures.