The adhesives covered by this specification are intended for use in securing cloth and tape to thermal insulations (class 1) and for securing thermal insulations to metal surfaces (classes 2 and 3). The use of these adhesives may extend to other facing materials typically used in the insulation industry. The thermal insulation referred to herein may include other insulation products such as acoustic and fire insulation. The requirement for an HHA and the requirement to verify that prohibited materials are omitted make this item military unique. Current stock of adhesives may be used until depleted; future requisitions for adhesives should refer to the current version of this specification. Adhesives procured to this specification are form, fit, and function replacements for prior revisions.