Waterproof Slide Fastener and Method of Applying Fluid Tight Coating to Tape

A waterproof slide fastener comprising:

• a pair of tapes having coupling elements attached thereto, wherein:
• a coating of polymeric material is provided on at least one surface of the tape and extends continuously therealong;
• the coating comprises in cross-section a fin with a bulbous region;
• the fins on each side of the slide fastener abut to form a seal comprising a first start point and a second end point;
• and
• the length between the first start point and the second end point of the seal is greater than the distance between a boundary point of an end edge of the tape at a side of the coupling elements and the coating and the first start point of the seal when the slide fastener is in a closed arrangement.