Perforated Tactoo Insulation Hangers are used to attach insulation with the use of General Purpose Adhesive. The GPA-72 is specially formulated to bond to metal, masonry and other sound substrates. Surfaces must be clean and dry before adhesive is applied. Some protective coatings are not compatible with adhesives and it is recommended that the user make test bonds before proceeding with the application. Please see AGM Data Sheet GPA on insulation hangers for more complete information regarding use, application, storage, etc. After the hanger is installed, insulation is impaled over the spindle and secured with a self-locking washer. Questions? Contact Us.