Easy EPDM flash was fabricated by three complementary functional materials.The structural surface layer is self-vulcanized EPDM, the built-in reinforcing material is aluminum mesh and the bottom layer is butyl self-adhesive rubber.Self-vulcanizing EPDM is a kind of vulcanized rubber product which compounds of Ethylene, propylene and butadiene through different process like mixing, filtering, extrusion molding and so on,with appropriate fortifier, filler, vulcanizator, accelerant, softening agent, etc.The built-in punching aluminum mesh(2*4mm) processed by special technology and butyl self-adhesive rubber has good air impermeability , water tightness and bonding ability.