Separable fasteners for attachment to other objects

In a strip fastener material adapted for securing to the surface of a foam bun during molding, wherein the fastener strip carries on a first surface an area of outwardly extending fastening elements constituting one half of a touch fastening system, and wherein said first surface is arranged to be positioned so that it faces into a trough in a mold wall, wherein the strip of material carries on said first surface a pair of elongated flexible sealing lips adjacent the edges of said area, magnetizable means carried by the strip, the fastener strip having portions extending laterally beyond the sealing lips and beyond the edges of the trough in the mold wall, and a portion of said strip outside of the volume defined by the sealing lips and being adapted to be buried in the foam;

• the improvement wherein a removable sealing layer covers the ends of said fastening elements and extends completely between said lips, said lips being free of the sealing layer, the combined thickness of the sealing layer and the fastening elements being less than the height of the lips, said sealing layer being held in place only by engagement with the outer ends of the fastening elements.