ASTM International Standard Specification for Structural Paste Adhesive for Sandwich Panel Repair ASTM E1555-20(2026)

This specification defines those characteristics that are required of adhesives to be used in the repair of sandwich panels for durable, rigid wall, relocatable structures. It covers two-part epoxy adhesive suitable for bonding aluminum alloy facings to nonmetallic core and core to core in the repair of durable rigid wall, relocatable structures. The adhesive shall be suitable for forming bonds that will withstand exposure to a certain temperature range and high relative humidity and will also withstand the combinations of stress, temperature, and relative humidity that are expected to be encountered in service. The adhesive shall also be suitable for the bonding of panel inserts and edge attachments. The adhesive physical characteristics such as adhesive life, curing, mix ratio, storage life, and mechanical properties shall be observed in order to determine its working characteristics. The following tests shall be conducted to determine certain mechanical properties: tensile lap shear test, flatwise tension test, climbing drum peel test, and durability test.