Abstract: A gas-and-water-tight flexible fastener comprises an plug being of a arrow-shaped cross-section and including a shaft and a head mounted on a front end of the shaft, the head having a pair of locking fins formed at the proximal ends so as to be directed rearward and outwardly; and a socket being of a squared C-shaped cross-section and including a base, a pair of substantially parallel side plates integrally formed with the base, the side plates having a pair of locking hooks formed along their respective confronting distal edges so as to be directed rearward and inwardly for locking engagement with the locking fins when the plug is forced into the socket between the opposed locking hooks, and resilient partition interposed between the opposed side plates for defining an inner hollow and an outer locking groove.

Abstract: A top stop for a water-tight slide fastener includes a generally C-shaped inner sealing body for water-tightly surrounding a diamond of a slider when the slide fastener is fully closed, and a generally C-shaped outer sealing body integral with the inner sealing body and extending around the outer periphery of the inner sealing body for water-tightly covering the flared mouth of a Y-shaped guide channel of the slider when the slide fastener is fully closed.